AT Review

What is atomic mass?

• the number of protons in an element

• the number of neutrons in an element

• the number of protons and neutrons in an element

• the number of protons and electrons in an element.

What is the mass of a neutron?

• about 1/1800th of an amu

• 0 amu

• 1 amu

• 2/3 kg

What is the mass of an electron?

• about 1/1800th an amu

• 0 amu

• 1 amu

• 2/3 kg

Changing the number of neutrons in an atom changes its

• element type

• isotope type

• charge

• atom type

What is the mass of a proton?

• about 1/1800th an amu

• 0 amu

• 1 amu

• 2/3 kg

Changing the number of electrons in an atom changes its

• element type

• charge

• isotope type

• atom type

When there are more protons than electrons in an atom it is a

• positive ion

• negative ion

• unstable isotope

• neutral atom

When there are the same number of protons and electrons in an atom, that atom is a

• positive ion

• negative ion

• unstable isotope

• neutral atom

Lithium-5 isotope has how many neutrons?

• 0

• 1

• 2

• 3

How many electrons does a neutral carbon atom have?

• 0

• 2

• 6

• 14