3M1 Chem Coursework 2

An atom that gains or loses one or more electrons to form a charged particle is called an ___________.

• atom

• ion

• cation

• anion

Which of the following is NOT a step in forming an ionic bond?

• One atom shares its electrons with another one.

• Opposite charged ions form due to electron transfer

• One atom gives electrons to another one

• Opposite charged ions attract

Why do ionic bonds form?

• So the number of protons equals the number of electrons.

• To stabilize the atom with a full outer shell.

• So an atom can become unstable.

• So atoms will stick together to form molecules.

An ionic bond is the attraction between

• oppositely charged ions

• similarly charged ions

• neutral ions

• neutral atoms

To form a charge of [3-] an atom must _________ electrons.

• Gain 2

• Gain 3

• Lose 2

• Lose 3

In the compound aluminum oxide, which is the cation?

• Al³⁺

• Al

• O^2-

• O

Ionic bonds form between metals and ____.

• metalloids

• metals

• nonmetals

• ions

What determines how ionic bonds will form?

• Number of protons

• Mass of the atom

• Number of total electrons

• Number of valence electrons

Magnesium chloride is an ionic compound with the chemical formula MgCl₂. What does the "2" tell you?

• There are 2 chloride ions for every magnesium ion

• Chloride has a 2- charge

• Chloride has a 2+ charge

• There are 2 magnesium ions to every chloride ion

During the formation of the ionic bond, one of the atoms gains electrons. This means that the ion formed is

• positive because an atom was added

• negative because electrons are negatively charged

• uncharged because the charges cancel off.

• negative because electrons are positively charged