Chapter 5 Test Review Flashcards
A compound differs from a mixture because it _______.
Always contains the same elements in the same proportion
The forces that hold different atoms or ions together are________.
Chemical bonds
Each molecule of hydrochloride acid, HCl, contains one atom of hydrogen and _______.
One atom of chlorine.
Each molecule of table sugar, C^12H^22O^11, contains ______.
12 atoms of carbon
In which substance do the molecules have the strongest attractions to one another?
Sugar, a solid
The bonds that hold atoms together behave most like
Flexible springs
What two hydrogen atoms bond, the positive nucleus of one atom attracts the
Negative electron of the other atom
An ionic bond that forms between
Ions with opposite charges
Covalent bonds are formed between
Nonmetal atoms
Copper is a good conductor of electricity because it’s electrons
Are free to move from atom to atom
Solid ionic compounds have very high melting points because they
Contain charged ions that are locked tightly together
In which type of bond do atoms share electrons?
Covalent bonds
Fe^2 O^3 is named iron (III) oxide because it contains
Fe^3+ ions
When nickel combines with fluorine to form nickel (III) fluoride, the charge of the nickel ion is
Ni^3+
A carbon atom can bond to four other atoms because it has
Four valence shell electrons
