Chemical Reactions

Which subatomic particle has a POSITIVE charge? (+)

• proton

• neutron

• electron

Which subatomic particle has a negative charge? (-)

• proton

• neutron

• electron

Which subatomic particle has a neutral charge? (0)

• proton

• neutron

• electron

Metals like potassium (K) and Lead (Pb) become a _____________ ion.

• positive

• negative

• neutral

Non-metals like oxygen (O) and chlorine (Cl) become a _____________ ion.

• positive

• negative

• neutral

A negatively charged iodine (I) ion would most likely be attracted to which of the following?

• A neutral helium (He) atom

• A positively charged lithium (Li) atom

• A negatively charged oxygen (O) atom

• Another negatively charged iodine (I) atom

Ionic bonds occur between a metal and a ____________

• metal

• non-metal

Metallic bonds occur between a metal and a ____________

• metal

• non-metal

Covalent bonds occur between a non-metal and a ____________

• metal

• non-metal

Which of the following explains the role of valence electrons?

• They give their ion a positive charge

• They are free electrons and not part of the atom

• They are electrons that have escaped the atom's nucleus

• They are the electrons in the outer shell of the atom that can be used to form bonds