Answer:
In a second hydrogen atom, an electron drops from level 2 to 1 .
Is this statement true or false?
If one or more substances change into new substances, a chemical change occurred.
true
false
Answer:
True
........
....
.....
....
....
...
..
...
...
The halogens, the elements of Family 17 on the periodic table, combine easily with elements from Family 1. When a halogen reacts with a metal, what type of compound is formed?
A.
salt
B.
potassium
C.
alloys
D.
noble gas
Answer:
A. saltExplanation:
When halogen elements react with group one metals they form halide salts.Sorry if it's wrong •-•Answer:
When Halogens are reacted with metals they form a salt
Explanation:
E.g Sodium+chlorine=sodiumchloride
which one is worse?
cigarettes or vaping?
would kindly appreciate it if you wrote why with a lot of information
Answer:
Both things are bad to your health but vaping has a minor impact in your health than cigarettes.
Explanation:
Even though vaping has a lot of chemicals that not just include nicotine but other substances that are toxic and that stay in your lungs for a long time giving it time to damage your lungs from the inside,
Cigarettes have over 7,000 toxic chemicals that can cause cancer and / or other illness in your body. This cancer can be caused inside your lungs but it can also give you cancer in other certain parts of your body.
NEED HELP ASAP!!!!
Which graph shows a negative acceleration? A - B - C - D
Answer:
C or D, as A and B are going upward and you need NEGATIVE acceleration so it has to be going down, though I believe it is C, but you'll have to confirm it.
Explanation:
In the given situation, Graph B shows negative acceleration because the velocity is decreasing. The option C is correct.
What is acceleration?The term acceleration is defined as the rate of change of an object's velocity with respect to time.
The change in rate of displacement is called as velocity. The rate of change of velocity is defined as acceleration.
It includes both magnitude and direction, velocity is a vector quantity. Because it is simply the rate of change of velocity, acceleration is also called a vector quantity.
The slope of the line on the velocity-time graph reveals the object's acceleration. An upward slope represents positive acceleration, which means the object is moving faster.
A downward slope represents negative acceleration, which indicates that the object is slowing down.
Thus, the option C is correct.
To learn more about an acceleration, follow the link;
brainly.com/question/12550364
#SPJ2
Match the element with its description.
Answer Choices:
1. Highly reactive gas
2. Malleable, soft, and shiny
3. Nonreactive gas
4. Has properties of both metals and nonmetals
What is the environmental change shown in the image?
dry and cracked soil with little vegetation
Disease
Lack of food and water
Reduced space
Pollution
Answer:
B. Lack of food and water is the answer. I don't see a picture
Answer:
a lack of food is your answer
Which drawing represents the electric field surrounding two objects that have equal magnitude charges of opposite polarity?
A) A
B) B
C) C
D) D
Answer: B
Explanation:
An object with a positive charge will have its arrows pointing outwards, while a negative object will have its arrow pointing inwards.
Earthquakes, volcanic activity, and mudslides most commonly affect which region in the United States?
A.
the Northeast
B.
the Interior
C.
the South
D.
the West
Water has a boiling point of 100 degrees Celsius, a melting point of 0 degrees Celsius, and a density of 1 g/cm. What is this a list of?
1. unimportant details
2. chemical properties
3. incorrect facts
4. physical properties
Answer:
Chemical properties
Explanation:
Water has a boiling point of 100°C or 373 KWater has melting point of 0°C or more exactly 273.16KThe density of water at 4°C is 1000kg/m^3ow doe the respiratory system work? (Use 3-5 sentences to explain how the respiratory system works.)
Answer:
The respiratory system is a system in your body that is in charge of helping you breathe. the respiratory system is made up of airways, lungs, and blood vessels, these parts work together to get oxygen into your body. Our respiratory system is a vital system, as it lets us live and breathe.
Explanation:
Here you go, don't copy exactly
the Monstera Plant, in the rainforest have long, grooved leaves to drop water to the forest
floor. The excessive water that falls in the rainforest could lead to mold, so the leaves adapted to
have “drip tips” that allow the water to run off of the leaves.
What type of adaptations are these?
Monstera Plants of the rainforest. Your answer should be 3–4 sentences long.
Answer:
Theses are physical adaptations. The trees have adapted to protect themselves against mold. The “drip tips” are a new physical part of the trees, so they are physical adaptations.
Answer the question below. Do not answer and just say "I do not know" Thank you!
C
One type of bacteria can have various forms.
The context above talks about some e coli useful and some e coli harmful so..
A family decides to use their bicycles to get to the mall on weekends instead of driving a car. How is the family helping the environment?
The family is using less renewable resources.
The family is using less non-renewable resources.
The family is causing less fertilizer to enter the water.
The family is causing less trees to be cut down.
Answer:
they are using less non renewable resources
Explanation:
Answer:
the second option:
The family is using less non-renewable resources.
Explanation:
If a car was used, the gas in the car would cause damage and or make the air dirtier than it already is (from the fums).
Plus when using a car, you waste more gas as well as money.
What is the is arrow pointing to? A.period symbol of manganese. B isotope symbol of manganese. C.group symbol of manganese. D atomic symbol of manganese.
Answer: The answer is D. the arrow is pointing at the atomic symbol of manganese
Explanation:
Atomic symbols are the letters that represent elements like how the atomic symbol "O" represents the element oxygen
When vinegar and baking soda are mixed together, they experience a chemical change.
What evidence given would lead a person to think that the change is a chemical change?
the solution heats up or cools off
the solution changes shape
the solution changes size
What element does this model represent?
Answer:
[tex]$\tex$ Option 2: Aluminum (Al)[/tex]
Explanation:
When we are given Bohr models, we will be given a circle with rings surrounding it. The circle in the center of the model represents the nucleus, which contains the neutrons and the protons. The rings will have spherical structures that are attached to them in an orderly fashion - these model the electrons of an atom.
Protons are positively-charged subatomic particles that also identify the atom's chemical identity and atomic number. Using the number of protons, we are able to identify the element. The neutrons are the neutrally-charged subatomic particles that give an atom its weight. When you look at a traditional periodic table, you'll see that the square that houses an element has its symbol, atomic number, and atomic mass. The atomic mass is equivalent to the sum of the protons and neutrons.Electrons are negatively-charged subatomic particles that give an atom its overall charge. In order for an atom to be stable and neutral, the electrons must equal the protons. Otherwise, we have an unstable atom called an ion with either a positive or a negative charge. This is dependent on whether an atom has gained or lost electrons.When we reference the model, we will see that there are 13 "p" and 14 "n" within the green circle. The "n" refers to neutrons and the "p" refers to protons. We can also count the red spheres and make quick observations about these: there are 2 red spheres on the innermost ring - for simplicity reasons, we will title this ring as r = 1. There are 8 red spheres on the middle ring - this ring will be titled r = 2. Finally, we can see that there are 2 more electrons in the outermost ring - this ring will be titled r = 3.
Now, because we have 13 protons, we know that the protons are equivalent to the atomic number.
If we check the periodic table, we will see that Silicon (Si) has an atomic number of 14. This doesn't match the number of protons, so we can rule out that a silicon atom is not the element shown.When we use the same process and check aluminum, we discover that Aluminum (Al) has an atomic number of 13. Since the number of protons and the atomic number are equal, we can conclude that this is the element.If we check Helium (He), we see that it has an atomic number of 2, so this is definitely not our element in question.Now that we have concluded that Aluminum is our element, we can check this to be sure. If we use the formula m = n + p (where m is the atomic mass, n is the neutrons, and p is the protons), we can check to be sure we have selected the right element.
The given mass of aluminum on the periodic table is 26.982 atomic mass units. We round to the nearest integer when it comes to this, so we round 26.982 up to 27 even.
Now that we have determined the atomic mass and we are given the number of both protons and neutrons, we can act as if we weren't given the amount of neutrons and only the mass and amount of protons. We can then use the equation to solve for the amount of neutrons and check that the selection we made is correct.
Steps
Substitute 27 for m and 13 for p.Subtract 13 from both sides to isolate the n and place the constants on the same side of the equation.Combine like terms by taking the appropriate operations (in this case, this is subtracting 13 from 27).Finally, because we are solving for n, you can reverse the equation (place the constant on the right and place the variable on the left; i.e., 72 = x → x = 72).[tex]27 = n + 13\\\\27 - 13 = n\\\\14 = n\\\\n = 14[/tex]
The work we just performed will allow us to confirm that because we solved for 14 neutrons, Aluminum (Al) is indeed the element represented by the model.
Hope this helps! :)
11) Maricela and Joaquim are standing on the floor very close to each other. They are not touching. Which of the following statements is true about the forces that are present?
A) The is a large gravitational repulsion between the two students.
B) There is a large gravitational attraction between the two students.
C) There is a small gravitational repulsion between the two students.
D) There is a small gravitational attraction between the two students.
Answer:
D
Explanation:
Anything with mass has gravitational attraction. Maricela and Joaquim have mass, which means they have gravitational attraction towards one another. Why are they not touching/getting close to one another? It is because both of them have a tiny amount of gravitational pull. In order for this to be considered a large amount of gravity (or B) , they would both would have to have a significant amount of mass, such as the moon or sun. The reason the answer is not A or C is because "gravitational repulsion" doesn't exist.
At the top of a high mountain, the weight of an object is:
A. greater than at sea level
B. less than at sea level
C. the same as that at sea level
Answer:
b is answer. im sorry
What do the dots around this letter represent ?
Answer: Valence electrons
Explanation: the dots represent the amount of electrons in an outer shell
Answer:
c
Explanation:
Valence electrons
What is A ATOM?
First one to answer will get BRAINLIEST!
Answer:
an atom makes up everything and anything. it is microscopic and the basic building block of any chemical or matter
Answer:
a atom makes up everything
(The pictures show four electrically charged items.) If a student rubs a glass rod with a piece of silk, giving the rod a positive charge, which of the items will the rod attract?
A) Balloon 1, only
B) Plastic sheet 1, only
C) Balloon 1 and Plastic sheet 2
D) Balloon 2 and Plastic sheet 1
Answer:
c
Explanation:
because because of the energy conecction all the pubical will come to getter and make he force stronger which by any mean attraction
Answer:
C) Balloon 1 and Plastic sheet 2
Explanation:
If gravity is always pushing down on you, what prevents you from sinking down into the ground?
Answer:
The ground is pushing you up with an equal force.
Explanation:
HOPE THIS HELPS ;)
Answer:
The ground is denser than we are. The atoms making up the ground are tightly packed so basically nothing and just fall through them.
Explanation:
Why is melting a physical property of the wax from a burning candle, but flammability is a chemical property?
Explanation:
, , ' . .
Answer:The physical change is quite often and can be seen clearly. When the wax melts slowly and the candle gets smaller and smaller. This is the physical change of the burning candle. This wax that melts slowly comes together back into solid and the sticks to the candle. This is also a physical change.
Explanation:
20 POINTS AND BRAINLIEST
Which material is typically used as a thermal insulator?
A. copper
B. foam
C. ceramic
D. aluminum
Answer:
ceramic
Explanation:
Is Fossil Fuel OverUse threatening your health
by: Erin Cobb
Summary Paragraph (last sentence MUST conclude) Your first sentence must include the title/author of the article, verb, and central idea
Answer/Explanation:
Is Fossil Fuel Overuse threatening your health? Pollution that not only can harm health but also foster climate changes. The Overuse of fossil fuel damages our health. For Instance, Burning fossil Fuel increates a carbon dioxide; to much CO_2 is harmful to our health. This Proves that Fossil fuel can harm our health. Burning fossil fuels could lead to developmental delays in children. This tells us it can be very harmful for children. To much Co_2 can cause children to have adhd. In the text it states children exposed to air pollution from fossil fuels have a significantly greater chance of developmental.Fossil fuels burning cause global warning that makes it difficult to grow crops. This reveals that Fossil fuels can be harmful for the environment. Burning fossil fuels can cause extreme weather and it can cause people to lose their homes and lives.
~Lenvy~
Answer:
Ofc fossil fuel overuse threaten my health.
Explanation:
Is Fossil Fuel OverUse threatening your healthIs Fossil Fuel OverUse threatening your healthIs Fossil Fuel OverUse threatening your healthIs Fossil Fuel OverUse threatening your healthIs Fossil Fuel OverUse threatening your healthIs Fossil Fuel OverUse threatening your healthIs Fossil Fuel OverUse threatening your healthIs Fossil Fuel OverUse threatening your health. YESHHHHHHHH.
A characteristic of this environment is very little precipitation, sometimes in the form of snow. Which environment is this describing?
Desert
NOT Grassland
Mountain
Tundra
Answer:
the answer is desert, hope this helped
Explanation:
I need help with These two please
I believe the first beaker is 17ml and the second one is 29ml, I hope this helps! Also remember to drink water today.
(GIVING BRAINLYIST) Environment A is warm and gets lots of rain. Environment B is warmer and gets more rain year round. Identify Environment A.
Desert
NOT B) Rainforest
Swamp
Tundra
Please Help I need it!!
(An electric motor uses regular magnets and an electromagnet to create motion. The attracting and repelling forces create rotational motion along with the electric current from the electromagnet.)
What two things can a car manufacturer do to make an electric motor stronger?
A) A car manufacturer can add coils to the electromagnet and increase the size of the magnets causing the rotational motion.
B) The car manufacturer can add coils the the electromagnet and decrease the size of the magnets causing the rotational motion.
C) The car manufacturer can remove coils from the electromagnet and increase the size of the magnets causing the rotational motion.
D) The car manufacturer can remove coils from the electromagnet and decrease the size of the magnets causing the rotational motion.
Answer:
The answers A i did the test
A car manufacturer can add coils to the electromagnet and increase the size of the magnets causing the rotational motion and the correct option is option A.
What are electromagnets?Electromagnets are made out of a coil of wire (wire curled in series).
This is more effective in producing a magnetic field than just a wire running straight.
This effect can be strengthened by winding a wire tightly around a powerful core made of magnetic material, such as iron.
The strength of the magnetic field is proportional to the number of turns made around the iron core and how tightly they are wrapped around.
Therefore, a car manufacturer can add coils to the electromagnet and increase the size of the magnets causing the rotational motion and the correct option is option A.
Learn more about Electromagnets, here:
https://brainly.com/question/3427992
#SPJ3
Which climate zone is hot and receives a lot of precipitation throughout the year?(2 points)
Equator
Polar
Temperate
Tropical
Answer:
Equator
Explanation:
Answer: tropical
Explanation: