Grade Nine chemistry Test

What is chemical bonding?

• compounds

• elements

• electrons

• atoms share electrons

Covalent bonding occurs when_________

• electrons are loss

• atoms share electrons

• atoms spin out of its orbit

• when atoms gain electrons

An ion is formed when atoms__________

• lose electrons

• share electrons

• gain electrons

• lose or gains electrons

Protons have a __________ charge

• positive

• negative

• neutral

• -1

Electrons have ____________ charge

• positive

• neutral

• negative

• +1

Electrons are found in the ___________ of the atom

• inside

• nucleus

• outside

• orbit

Anions have a __________- charge

• positive

• negative

• neutral

• both negative and positive

cations have a __________ charge

• positive

• negative

• both

• neutral

Na is the chemical symbol for

• Neon

• Sodium

• Nitrogen

• Chlorine

oxygen has an atomic number of

• 6

• 8

• 16

• 10