Atoms and Ions

The Bohr model of fluorine ion shows that fluoride ion has _____ charge?

• 0

• +1

• -1

• +8

The image shows an atom of

• silicon

• nitrogen

• carbon

• oxygen

The accepted modern theory of atom structure is the Electron Cloud Model. What does the cloud represent?

• the energy levels

• the central nucleus

• probable location of electrons

• location of protons and neutrons

The image shows

• a no-charge magnesium atom

• an isotope of magnesium

• a magnesium ion

How many neutrons a copper atom has?

• 29

• 34

• 63

Two ways to write an isotope symbol.

• ²³₁₁Na

• sodium-11

• Na-23

The sodium ion below

²³₁₁Na⁺

• loses an electron

• gains an electron

• has 1 more proton than electron

• has 11 protons and 10 electrons

Sodium-ion is

• neutral.

• a cation.

• an anion.

The chloride ion

• is an anion.

• is a cation.

• gains one electron.

• loses one electron.

The aluminum ion in the image

• gains 3 electrons.

• loses 3 electrons.

• has 3 more protons than electrons.

• has 13 protons, 10 electrons, 14 neutrons

• has 13 protons, 13 electrons, 27 neutrons