Introduction to chemical bonding Grade 11

An atom that has lost an "electron" becomes a

• negative ion

• positive ion

An atom that has gained "electrons" becomes a

• Positive ion

• Negative ion

Some atoms ............ electrons and form covalent bonds

• share

• transfer

Some atoms ............ electrons and form covalent bonds

• share

• transfer

Which model shown could represent a diatomic molecule of I₂?

• Model 1

• Model 2

• Model 3

• None

Why do atoms form chemical bonds?

• To achieve a less stable electron configuration
• To increase their overall energy
• To prevent the formation of chemical compounds
• To achieve a complete octet and lower their overall energy.

Ionic bonds are formed when

• atoms gain neutrons
• atoms transfer electrons
• atoms share electrons
• atoms lose protons

When atoms share valence electrons, a _______ bond is formed.

• hydrogen
• metallic
• covalent
• ionic

Ionic bonds form as a result of the electrostatic attraction between

• dipoles.

• electrons.

• ions.

• nuclei.

Atoms seldom exist as independent particles in nature because

• as single particles, most atoms have low potential energy.

• their electronegativity is much lower when they combine with other atoms.

• atoms are more stable when they combine with other atoms.

• neutral particles are rare.