Atoms, Ions & Isotopes Pre-Assessment

The center of an atom is the

• Nucleus

• Proton

• Neutron

• Electron

The part of the atom that has a positive charge is the

• Molecule

• Neutron

• Proton

• Electron

The neutron has _______ charge.

• Positive

• Negative

• No charge

• Alternates between positive and negative

Negatively charged particles that move around outside the nucleus are the ......

• Elements

• Compounds

• Electrons

• Protons

To change Li (lithium) to Li⁺ (lithium ion), you need to:

• Add one electron

• Remove an electron

• Remove one proton

• Add one neutron

Fe²⁺ and Fe³⁺ are different iron _______

• Ions

• Isotopes

• Elements

• Atoms

¹⁴₆C and ¹²₆C are examples of carbon:

• Ions

• Neutrons

• Isotopes

• Molecules

¹⁴₆C has how many protons?

• 6

• 8

• 14

• 20

¹⁴₆C has how many neutrons?

• 6

• 8

• 14

• 20

Li⁺ and Cu²⁺ are examples of ions called:

• Anions

• Cations

• Istopes

• Molecules