true or false? The lower the ionization

energy, the easier it is to remove an electron from an atom.

 true or false? The attractions among ions

within a crystal lattice are weak.

 true or false? In a covalent bond, the atoms

are held together by the attractions between the shared electrons

and the protons in each nucleus.

When atoms form a polar covalent bond, the atom with the greater

attraction for electrons has a partial________ charge.

 true or false? In a molecule of a

compound, electrons are always shared equally by both atoms.

Water has a higher boiling point than carbon dioxide because

attractions between polar molecules are______ than attractions between nonpolar molecules.

When a metal forms more than one ion, the name of the ion contains

a Roman numeral to indicate the on the_______ ion.

Some of the properties of metals can be explained by the

________of the electrons within a metal lattice.

true or false? The new substances formed

as a result of a chemical reaction are called products.

 true or false? The law of conservation

of mass states that mass is neither created nor destroyed in a

chemical reaction.

 true

Chemists use a counting unit called a(n)_______ to

measure amounts of a substance because chemical reactions often

involve large numbers of small particles.

 true or false? A decomposition reaction is

the opposite of a synthesis reaction.

true or false? A combustion reaction is a

reaction in which a substance reacts with carbon dioxide, often

producing heat and light.

The process in which an element gains electrons during a chemical

reaction is called __________

Chemical reactions involve the breaking of chemical bonds in the

reactants and the formation of chemical bonds in the ______

true or false? Physical and chemical

changes can be either exothermic or endothermic changes.

true or false? In exothermic reactions, the

energy required to break the bonds in the reactants is greater than

the energy released as the products form.