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Chemistry

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Daija Kreiger

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Cards in this guide (12)
How many protons does an atom of carbon have

6

Atoms with certain characteristics are radioactive Which is least likely to be radioactive

all atoms with an atomic number under 40

Cesium-133 has an atomic number of 55 It has neutrons

It has 78 neutrons.

The mass number is .

the number of neutrons plus the number of protons

Which are true of gamma radiation

It usually occurs with other types of radioactive decay, It has no charge.

Which is are used in nuclear reactors to absorb neutrons

control rods

Is Thermodynamics the study of the relationships among heat work and other forms of energy

Yes this is correct.

"Thermodynamics is the study of the relationships among heat, work and other forms of energy."

What is the difference between hydrogen fuel cells and hydrogen fussion

In fuel cells the hydrogen is oxidised to water. In fusion 2 different isotopes of hydrogen (deuterium and tritium) fuse together to form helium.

What is the name of the meridian labeled 0

The name of the meridian that is labeled 0 is the Prime Meridian.

It isn't possible to transfer heat from an object at a lower temperature to another object at a higher temperature unless

It isn't possible to transfer heat from an object at a lower temperature to another object at higher temperature unless work is done to the system. An example of this is a refrigerator.

Is it true that the entropy of a system decreases over time

false

Why would this career require a knowledge and understanding of Economics

no

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