Chapter 3: Molecules and Compounds

Question 1

what are the 2 types of chemical bonding

Answer 1

ionic and covalent

Question 2

in a covalent bonds are electrons shared equally

Answer 2

electrons are not always shared equally

Question 3

what is a binary compound

Answer 3

ionic bond between metal and nonmetal

Question 4

what is a ternary compound

Answer 4

ionic bond between metal and polyatomic ion

Question 5

what is structural formula

Answer 5

skeletal

Question 6

do ionic compounds have individual molecules?

Answer 6

no, they form a crystalline lattice

Question 7

what is empirical formula

Answer 7

smallest whole number ratio of the elements in a compound

Question 8

what element is listed first in chemical formula for organic compounds

Answer 8

carbon followed by hydrogen

Question 9

name of CH4

Answer 9

methane

Question 10

name of C2H6

Answer 10

ethane

Question 11

name of C3H8

Answer 11

propane

Question 12

what is the general rule when naming binary covalent compounds?

Answer 12

element farthest to the left or farthest down is written first

Question 13

what is formula mass

Answer 13

average mass of the molecule

Question 14

what is molecular weight

Answer 14

sum of the atomic weights of all atoms in a molecule

Question 15

formula weight

Answer 15

sum of the atomic weights of all atoms in one formula unit of the compound

Question 16

molar mass

Answer 16

mass in grams of one mole of a substance

Question 17

percent composition of a compound can be expressed as what

Answer 17

mole ratios

Question 18

what is emirical formula

Answer 18

smallest whole number ratio of the elements in a compoundwhat

Question 19

what are alkanes

Answer 19

the simplest family of hydrocarbons

Question 20

what is the molecular formula of an alkane?

Answer 20

C(n)H(2n+2)