Atomic Structure

Which of the following is included in the calculation of atomic mass?

• Quarks

• Electrons

• Neutrons

• Protons

Which of the following has a positive charge?

• Neutron

• Electron

• Quark

• Proton

Which has a negative charge?

• Neutron

• Electron

• Quark

• Proton

Which has a neutral charge?

• Quark

• Electron

• Proton

• Neutron

Which determines the identity of an element?

• atomic mass

• number of neutrons

• number of electrons

• atomic number

When an atom gains or loses protons it becomes an ion.

• True

• False

How many protons, neutrons, and electrons does the atom 7Li-2 have?

• P-3 N-2 e-7

• P-4 N-3 e-7

• P-4 N-2 e-3

• P-3 N-4 e-5

The atom 7Li-2 is both a(n) ___________ and a(n) ___________.

• ion, isotope

• isotope, molecule

• ion, compound

• molecule, compound

An ion with a negative charge is called a ______.

• anion

• cation

• neutron

• proton

An atom with a positive charge is called a ______.

• cation

• anion

• neutron

• electron