WorksheetsThe Atom - Unit Review
Total questions: 22
Worksheet time: 29mins
If an atom loses a neutron, what happens?
Its mass is lowered, and it becomes a different element.
Its mass stays the same, and it is still the same element
Its mass stays the same, and it becomes a different element.
Its mass is lowered, but it is still the same element.
The mass of an electron is __________.
equal to the mass of the proton and the neutron
not significant to the overall mass of the atom
higher than the mass of the proton or the neutron
If this atom has a balanced charge, how many protons would you expect to find in this atom? (Refer to the illustration to answer this question)
2
6
4
0
Which term describes atoms with different atomic masses due to varying numbers of neutrons?
compounds
isotopes
cations
ions
What is the amount of a certain isotope that occurs in a natural sample of an element?
percent abundance
percent atomic weight
average atomic mass
ion abundance
Protons and neutrons are composed of __________.
quarks
molecules
ions
electrons
Why does radioactive decay occur?
Nuclear forces disintegrate protons.
The electric force and nuclear forces are in opposition to each other.
The electric force causes electrons to be released.
When does radioactive decay occur?
when an atom gains electrons
when neutrons accumulate in the nucleus
when the nucleus decays
when an atom loses electrons
