Certain naturally occurring radioactive isotopes are unstable: Their nucleus breaks apart, undergoing nuclear decay. ... All elements with 84 or more protons are unstable; they eventually undergo decay. Other isotopes with fewer protons in their nucleus are also radioactive.
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Answer: it is group1 or group 3 on god
Explanation:
What is a characteristic of straight chained alkanes?
●They have one or more rings of carbon atoms.
●They have carbon atoms that are double-bonded to other carbon atoms. ● They have more than two carbons that are bonded to only one other carbon. ●They have carbons bonded in a single row from one end of the molecule to the other end of the molecule.
Answer:
● They have more than two carbons that are bonded to only one other
Explanation:
They have carbons bonded in a single row from one end of the molecule to the other end of the molecule. ... The straight-chain alkane has two more hydrogen atoms than the cycloalkane
Answer:
D. They have carbons bonded in a single row from one end of the molecule to the other end of the molecule.
Explanation:
I got it wrong when I chose C - They have more than two carbons that are bonded to only one other carbon. So yeah p.s UNUS ANNUS
CrO42-+2H+=Cr2O7^2-+H2O
A student add sodium hydroxide (NaOH) to the solution equilibrium. In 1 to 2 sentences describe and explain any changes to the solution that the student will observe.
Addition of NaOH will cause the equilibrium position to move to the left because of the removal of the hydrogen ions.
Equilibrium position
When changes in temperature, pressure or concentration is imposed on a reaction system in equilibrium, the system will readjust itself in order to annul the change.
This change occur when the equilibrium position is moved to the left or right. For the reaction, CrO4^2-+ 2H^+ ⇄ Cr2O7^2- + H2O, addition of NaOH will cause the equilibrium position to move to the left because of the removal of the hydrogen ions.
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Match the correct type of energy transfer that takes place.
Answer:
Lightbulb: electrical energy to light energy
Alarm Clock: electrical energy to sound energy
Rollercoaster: electrical energy to mechanical energy
Riding a Bike: chemical energy to mechanical energy
Explanation:
Light bulbs, alarm clocks, and roller coasters require electrical energy to work. This energy then changes into the subsequent types. Light bulbs primarily emit that energy in the form of light, alarm clocks change that energy into sound, and roller coasters begin to move (mechanical). People power bikes, and the energy in our body is stored as chemical energy. So, when we rides bikes, that energy gets turned into moving (mechanical) energy.
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Is there a different way to balance a synthesis, decomposition, single displacement and double displacement reactions or is it all the same
Answer:
This is the reverse of a synthesis reaction. Replacement reactions occur when elements switch places in compounds. In a single replacement reaction, one element takes the place of another in a single compound. In a double replacement reaction, two compounds exchange elements
What best explains why the moon's surface gravity is only one-sixth of Earth's surface gravity?
A) Earth is closer to the Sun, so it has much more gravity.
B) Gravity is controlled by the tides, which are much closer to Earth than the moon.
C) The moon orbits Earth faster than Earth orbits the Sun, giving the moon less gravity.
D) Gravity is the result of an object's mass and size; the Earth is much larger than the moon.
Answer:
D) part is the correct answer
Answer:The answer is D
Explanation:The moon is a bit more than one-fourth (27 percent) the size of Earth, a much larger ratio (1:4) than any other planets and their moons. Earth's moon is the fifth largest moon in the solar system. The moon's mean radius is 1,079.6 miles (1,737.5 kilometers).
What Percent of the moon is always
in daylight?
Answer: 50%
Explanation:
The best we get from the moon is a full moon, which is just half of the moon shining from the earth while the other half is in complete darkness.
20 Points! A student takes a beaker with distilled water and dissolves 30.0 grams of salt into the beaker of water. He realizes he forgot to measure the mass of the water before-hand! The end mass of the beaker with salt water is 851.0 grams and the empty beaker originally has a mass of 412.0 grams. What is the mass of the distilled water?
Answer:
409.0 grams
Explanation:
total mass-(mass of salt+mass og empty beaker)
Answer:
442
Explanation:
og empty beaker + salt
why helium is inactive
why helium is inactive
Answer:- Outer shell of the He (1s) is completely filled with the 2 electrons He has very low intermolecular forces so it donot get liquefied even Due to complete duplet it has stable configuration so it doesn't required to react with another atoms to attain stabilityDue to high stability it is also placed among noble gases which are also called inert gasesPLS HELP ASAP DUE AT 11:59 AND IM MARKING BRAINLIEST
PLS DO NOT ANSWER IF YOUR NOT SURE ABOUT YOUR ANSWER. this is science btw.
Answer:
In the followings below, the one that doesn't attract to magnets is:
Option 4, Aluminum.
Explanation:
Mainly because of the aluminum's crystal structure.
Hope this helped you out! ^^
#CarryOnLearning
Answer:
Aluminum
Explanation:
Ferromagnetic Metals
Ferromagnetic metals and alloys are the only magnetic metals. Out of all of the elements on the periodic table, there are only 3 metals that are attracted to magnets: iron, nickel, cobalt.
Aluminum
Aluminum is a nonferrous metal (meaning not including iron or steel) that does not include any ferromagnetic metals. Additionally, aluminum itself is not magnetic, so there is no attraction between aluminum and a magnet.
18 sep analyze and interpret data the table shows several ionic solids, their average
bond energies in electron volts (ev), and their melting points. use the pattern
indicated in the table to predict the average bond energy of calcium fluoride (caf2
), which has a melting point of 1420°c.
The bond energy is the energy that must be supplied to break the bond. Ionic substances are held together by strong bonds.
What is bond energy?This question is incomplete but I will try to explain what is meant by average bond energy as the tables are missing.
The average bond energy of a bond simply means the energy that is stored in that bond as it holds two atoms together. It is equal to the energy that must be supplied to break the bond. The numerical value of the bond energy can not be deduced as the data is missing.
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What was the original meaning of the term oxidation.
Answer:
reaction with oxygen
Explanation:
The term oxidation was originally used to describe reactions in which an element combines with oxygen.
Which of the following is the most violent of all solar disturbances?
a
solar winds
b
sunspots
c
prominence's
d
solar flares
What is A,B and C in the following picture?
Answer:
A= Coconut oil, B= Water, C= Sea water
Explanation:
oil is dense, water will allow things to float, but not as well as sea water
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Give a reason why it might be important to know Newton’s second law in the real world.
Answer:
Newton's Second Law states that an object's acceleration depends on the net force upon the object, as well as the object's mass.
So, a real world example of this would be pushing a vehicle out of a ditch. If your vehicle is a motorcycle, with a relatively small mass, then you don't need to apply much force on it, as compared to if the vehicle were a pickup truck, with a large mass, which would require much more force applied to move it out of the ditch.
I hope this helps! Feel free to give me Brainliest if you feel this helped. :)
Answer:
One reason why it could be important is hitting a ball. if the ball is heavy it will be harder to hit it far than if its light.
When should a lab coat, safety goggles, and gloves be worn in the laboratory?
always, no exceptions
always, unless the teacher instructs otherwise
only when the teacher says to wear them
never in chemistry labs
Answer: the answer is a
Explanation:
you should always keep lab coat on when in lab
Answer:
its A. chemistry labs have a lot of things that can hurt you, even with just a few drops . its one of the most dangerous experiment types you do in science. even if your not doing an experiment but your in the room you should have on protection in case of a spill or something. it is always impotent to have safety gear on. even more so in chemistry
what would be the volume in ML
Answer:
Explanation:
720 ml
Answer:
720 ml
Explanation:
An atom can be called a particle, but a molecule is never called a particle.
Answer:
Atoms are composed of particles called protons, electrons and neutrons. ... A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. Protons and neutrons are both composed of other particles called quarks and gluons.
Particles can be atoms, molecules or ions. The term molecule is often used incorrectly to refer to any type of chemical compound. A molecule is a neutral particle made of two or more atoms bonded together. Take care with your own language, especially when referring to compounds formed during chemical reactions.
Do they want me to tell them the materials please help need it turned in by 12:00Am
How can magnets store energy?
How many unpaired electrons does each element have?
Carbon : ______________________
Oxygen : ______________________
Sulfur : ________________________
Answer:
Carbon has 2 unpaired electrons
Oxygen has 2 unpaired electrons
Sulfur has 2 unpaired electrons
Explanation:
The color and temperature of stars are closely related. Which color star is the hottest?
Use the drop-down menus to identify which of these stars is the smallest, which is the largest, and which is in the middle.
Answer:
blue star is the hottest of all
Explanation:
Blue stars are blue because of the temperature of their surface and they are so hot because they are much more massive than cooler stars like our sun.
A teacher has 0.43L of 13M HCl solution and needs to dilute
it to 3.OM. How many liters of the diluted solution will be
produced?
Answer:
Initial Volume ( V₁ 0.43L
Initial Concentration (M₁) 13M
Final Concentration ( M₂) 3.0M
Final Volume ( V₂) = ?
we have to determine the final volume of diluted solution .
Using Dilution Equation
[tex] \bull\bf \: M_{1}V_{1} = M_{2}V_{2} [/tex]
Put the given value
[tex]\sf \longrightarrow \: (13 \times 0.43) = (3 \times \: V_{2} ) \\ \\ \\ \sf \longrightarrow \:(5.59) = 3V_{2} \: \\ \\ \\ \sf \longrightarrow \: \:V_{2} \: = \dfrac{5.59}{3} \\ \\ \\ \sf \longrightarrow \: \: V_{2}\: = 1.86 \: litre[/tex]
Therefore,
1.86 L of the diluted solution will produced .A gas at STP occupies 16 L of space. If the pressure changes to 2.6 atm and the temperature increases to 195 degrees C, what is the new volume? Show your work.
I WILL MARK YOU BRAINLIEST! PLEASE HELP!
The new volume of a gas at STP that occupies 16L of space is 27.43L.
HOW TO CALCULATE VOLUME?The volume of a given gas can be calculated using the following expression:
P1V1/T1 = P2V2/T2
Where;
P1 = initial pressureP2 = final pressureV1 = initial volumeV2 = final volumeT1 = initial temperatureT2 = final temperature1 × 16/273 = 2.6 × V2/468
16/273 = 2.6V2/468
0.0586 × 468 = 2.6V2
V2 = 27.43
Therefore, the new volume of a gas at STP that occupies 16L of space is 27.43L.
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60 points please help me!
a SOV
What is the opposite process to melting?
What is opposite process to melting?
Answer:
solidification
Explanation:
How does Neptune’s orbit affect its climate?
A. Its retrograde orbit creates a low troposphere.
B. Its equatorial orbit creates unpredictable storms.
C. Its circular orbit creates mild seasons.
D. Its differential orbit creates strong latitudinal winds.
Neptune’s orbit affect its climate by creating unpredictable storms.
How does Neptune’s orbit affect its climate?Neptune's orbital period is 165 years in which seasons are 40 years long. Neptune has unique and strangest weather in the entire Solar System. It has huge storms with extremely high winds.
So we can conclude that Neptune’s orbit affect its climate because equatorial orbit creates unpredictable storms.
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Give the names of any two synthetic indicators.
Two common synthetic indicators are
Methyl red PhenophthaleinThe indicators are used to check whether the solution is basic or acidic
HNO3(aq)+H2S(s)> Ss)+ NO(g)+H2O(l)
Answer: Nitric acid + Hydrogen disulfide
Explanation: To balance HNO3 + H2S = NO + S + H2O you'll need to be sure to count all of atoms on each side of the chemical equation.
Once you know how many of each type of atom you can only change the coefficients (the numbers in front of atoms or compounds) to balance the equation for Nitric acid + Hydrogen disulfide .
Important tips for balancing chemical equations:
Only change the numbers in front of compounds (the coefficients).
Never change the numbers after atoms (the subscripts).
The number of each atom on both sides of the equation must be the same for the equation to be balanced.
The elements B , Si , Ge , As , all can be classified as what type of element ?
A. Noble Gases
B. Metals
C. Metalloids
D. Nonmetals