Answers
Step 2: 12 - 6 = 6
Therefore the number of neutrons is 6
Because the number of neutrons is equal to the difference between the mass number of the atom and the atomic number
Related Questions
Using the Periodic Table predict which elements will have similar chemical properties or reactivity.
Group of answer choices
rubidium, yttrium, and zirconium
nitrogen, sulfur, and bromine
magnesium, strontium, and barium
cadmium. calcium, and carbon
Answers
Answer:
magnesium. stronsium. barium. they are have similar group in IIA
You are about to take a short trip. However, you will not be traveling by car or bus; instead you will be traveling up in a hot air balloon. You know that hot air balloons, like the ones pictured, are able to rise when the air contained in them is heated. Why does the balloon rise? What is happening at the molecular level to make the balloon rise?
Answers
Answer:
Hot air rises. Heated air molecules “spread out” or expand and bounce around, and the space becomes less dense than the surrounding space. Increasing the air temperature inside the balloon envelope makes it less dense than the air, thus making it “lighter than air”.
Explanation:
I'm new to brainly but I hope this helped!
Balloon rise because Warm air ascends. Heat causes the molecules of the air to "spread out," or expand, and bounce off one another, making the area less dense than the surroundings.
What are molecules ?
A molecule is the smallest unit of a substance that keeps its content and properties. It is made up of two or more atoms that are joined together by chemical bonds.
Chemistry is built on molecules. The element symbol and a subscript indicating the number of atoms are used to identify molecules.
When Balloon rise because Warm air ascends. Heat causes the molecules of the air to "spread out," or expand, and bounce off one another, making the area less dense than the surroundings.
The air inside the balloon's envelope becomes less dense as the temperature rises, making it "lighter than air."
To learn more about molecules, refer to the below link:
https://brainly.com/question/14130817
# SPJ2
how do you write out 4,5-dimethyl-4-octene
Answers
you can see the answer at the pic
Which scenario is an example of primary succession?
A.
the formation of soil after a volcano
B.
the growth of weeds after a flood
C.
the establishment of a forest in an abandoned crop field
D.
the recovery of grassland after a fire
Answers
Answer:
the answer to your question is A
Lime stone is a sedimentary rock that contains calcium this type of rock typically forms in warm shallow marine waters. Which process is involved in distributing calcium before it becomes part of the sedimentary rock?
A) tectonic movement
B) weathering
C) a biological process
D) volcanic activity
Answers
Answer:
the answer is B!!!
Explanation:
When coal is burned, sulfur is released into the air, where it reacts with oxygen to produce sulfur dioxide and sulfur trioxide. Which of the following is true of this process?
A. The identity of each reactant remains the same.
B.Sulfur dioxide and sulfur trioxide are the reactants in this change.
C.The products have different chemical properties than those of the reactants.
D. The products contain more sulfur atoms and fewer oxygen atoms than the reactants.
Answers
Answer:
c
Explanation
they have different properties now
What is wrong with the answer, 10.5 x 10^3? Think about the proper form used to show a number in scientific notation.
Answers
Answer:
1.05 × 10^4.
Explanation:
The proper scientific notation will be
1.05 × 10^4.
Which tissues and organs belong to the Musculoskeletal System?
Answers
What happens to particles in a solid when heat is applied? (3 points)
a
They move around more.
b
They get closer together.
c
They reduce in size.
d
They stop moving.
Answers
Answer:
They move arond more
Explanation:
What are the reactants of photosynthesis?
Answers
Answer:
The photosynthesis chemical equation states that the reactants (carbon dioxide, water and sunlight), yield two products, glucose and oxygen gas. The single chemical equation represents the overall process of photosynthesis.
Explanation:
How do you calculate mass and velocity does that equal to a certain amount of more energy or no
Answers
Answer:
The formula is: p=mv
(P)momentum is equal to (m) mass times (v) velocity.
Explanation:
What is Mercury's proximity to the sun
Answers
Answer:
46.943 million km
Explanation:
From an average distance of 36 million miles (58 million kilometers), Mercury is 0.4 astronomical units away from the Sun.
Answer:
29.169 million miles
Explanation:
From an average distance of 36 million miles(58 million kilometers,Mercury is 0.4 astronomical units away from the sun.
Why is the nitrogen cycle considered a closed system?
Answers
Answer:
because nitrogen is fixed by bacteria and assimilated by plants
Explanation:
Answer:
It is a considered a closed system because nitrogen is fixed by bacteria and is taken in by plants.
Explanation:
А. B
Which of the following is true about the picture above? What would it be?
Answers
Answer:
Container A is a solution and Container B is a colloid.
Explanation:
Container A is a solution as the tyndall efffect is not present. You cannot see the light bean through the glass.
Container B is a suspension or a colloid as you can see the beam through the glass.
The first option proposes Container A is a colloid...this is not correct
The third option is not true as the tyndall effect is only displayed in container B
The fourth option is not correct the tyndall effect is not present in container A meaning it would not be a suspension or a colloid and you can see the tyndall effect in container B indicating its not a solution
The compound, BeCl2, would be formed by
a. The sharing of all electrons
b. The transfer of all electrons
c.
The transfer of valence electrons
d. The sharing of valence electrons
Answers
Answer:
The sharing of valence electrons
Explanation:
A covalent bond is formed when two or more atoms share valence electrons.
In BeCl2, electrons are shared between the beryllium atom and two chlorine atoms.
Owing to the large difference in electronegativity between the two elements, the bond is polar covalent.
What is the mass of 8.250 moles of Cu2O?
Answers
Answer:
How many moles CU2O in 1 grams? The answer is 0.0019838596354237. We assume you are converting between moles CU2O and gram. You can view more details on each measurement unit: molecular weight of CU2O or grams The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles CU2O, or 504.06792 grams. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between moles CU2O and gram. Type in your own numbers in the form to convert the units
How do I do this problem???
Answers
Answer:
i believe it's c
Explanation:
my reason is that if you look at the electrons 2 is the most comm
Please help me thank you! Stay safe
Answers
Answer:
number 3
Explanation:
Explanation:
it's the third graph
values are put directly without scaling
Water molecules are polar because the
water molecule has a linear shape.
water molecule has a bent shape.
oxygen atom has fewer electrons around it.
hydrogen atom forms an ionic bond with oxygen.
Answers
Answer: B (water molecule has a bent shape)
Explanation:
Water molecules are polar molecules because of their shape. Water molecules have one side that is positively charged due to hydrogen atom which is partially positive and the other side which is negatively charged, due to the oxygen atom.
When two molecules get close to each other the polar forces of attraction brings them close to each other. Oxygen bonds with several hydrogen atoms in the other water molecules resulting to hydrogen bonds.
Answer:
the answer is B
Explanation:
According to the law of conversion of mass in a chemical equation
Answers
In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system.
Explain three ways the periodic table is organized. Include in your essay the
definition of two listed trends and the patterns observed for each of your selected
trends on the periodic table
Answers
Answer:
The periodic table is organized in non-metals metals and metalloids, in in terms of trends and patterns you may want to talk about the the density of the elements or the mass of per unit of measurement of whatever you're going to use sorry that could be much help but I hope it helps.
Question 9 (2 points)
What is the only part of the scientific method that can be proven wrong?
A/
Answers
Answer:
hypothesis
Explanation:
hypothesis is only a guess at what will happen. So it is possible that it could be wrong.
Which group on the periodic table ways to lose electrons?
Answers
Answer:
Elements that are metals tend to lose electrons and become positively charged ions called cations. Elements that are nonmetals tend to gain electrons and become negatively charged ions called anions. Metals that are located in column 1A of the periodic table form ions by losing one electron.
Explanation:
hope it helps!
how many picoliters are in 3.16 mL
Answers
Answer:
3.16×10⁹ pL
Explanation:
Given data:
Volume in mL = 3.16
Volume in picoliters = ?
Solution:
Picoliter and milliliters are units of volume. Milliliter is greater unit than picoliter.
1 mL = 10⁹ pL
Now we will convert the 3.16 mL into pL.
3.16 mL × 10⁹ pL/ 1 mL
3.16×10⁹ pL
A student drops a 95g object into a graduated cylindor that has 30ml of water in it. After the object is added to the cylinder the water level reads 63ml. What is the density of the object?
Answers
Answer:
The answer is 2.88 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass = 95g
volume = final volume of water - initial volume of water
volume = 63 - 30 = 33 mL
We have
[tex]density = \frac{95}{33} \\ = 2.87878787...[/tex]
We have the final answer as
2.88 g/mLHope this helps you
Oxygen atoms have six outer electrons
Write the symbol for an oxide ion.
Answers
Answer:
[tex]O^{2-}[/tex] is the symbol for an oxide ion
Please help first one two answer will get brainliest!
Type the correct answer in the box. Spell all words correctly.
Stacy finds a gun at a crime scene. Which part of the gun should she never touch?
Stacy knows never to touch the __________
with her hands or any other object so she does not accidentally discharge the weapon.
Answers
Answer:
the trigger . it's the trigger
Answer:
It is the handle
Explanation:
I know because I did this test in school
How do you think chemical change is defined?
Answers
Answer:
A chemical change happens when one chemical substance is transformed into one or more different substances,
Explanation:
Help please and explain so I could see you didn’t guess
Answers
Answer:
A
Explanation:
because the acid in your stomach can break down anything that you eat causing you to have to use the restroom
Which of the following is a CORRECT statement?
Chemical change cannot be undone or reversed.
Physical change often cannot be undone or reversed.
In chemical change, you end up with the same substance you started with.
In physical change, particles of 2 or more substances rearrange to form new or different substance.
Answers
Answer:
Detail is given below.
Explanation:
1) Chemical change cannot be undone or reversed.
The given statement is correct. Because,
Chemical change:
The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.
These changes are irreversible .
Example:
Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood and this reaction can not be reversed.
2) Physical change often cannot be undone or reversed.
The given statement is incorrect.
Physical Change
The changes that occur only due to change in shape or physical properties but their chemical or internal composition remain unchanged.
These changes were reversible.
Example :
Water converting to Ice
Water converting to gas
3) In chemical change, you end up with the same substance you started with
The given statement is incorrect. Consider the following example.
The reaction of Hydrogen and oxygen:
H₂ (g) + O₂ (g) -------------------------------------> 2H₂O (l)
A totally new compound is formed when oxygen and hydrogen are undergo reaction which is water.
4) In physical change, particles of 2 or more substances rearrange to form new or different substance.
The given statement is incorrect.
When particles rearrange them selves the different substance is not formed. Consider the example of water when it converted into ice or vapors. Only phase is changed but water retain its properties so new substance is not formed.