Lecture 2

Question 1

NH₄⁺

Answer 1

Ammonium ion

Question 2

H₃O⁺

Answer 2

Hydronium ion

Question 3

HCO₃^-

Answer 3

Bicarbonate ion

Question 4

HSO₄^-

Answer 4

Bisulfate

Question 5

OH^-

Answer 5

Hydroxide ion

Question 6

C₂H₃O₂^-

Answer 6

Acetate ion

Question 7

CN^-

Answer 7

Cyanide ion

Question 8

H₂PO₄^-

Answer 8

Dihydrogenphosphate ion

Question 9

SO₄^2-

Answer 9

Sulfate ion

Question 10

Atomic number =

Answer 10

protons

Question 11

Atomic mass

Answer 11

protons + #neutrons

Question 12

Different isotopes of an element have….

Answer 12

the same atomic number but different number of neutrons

Question 13

Intrinsic physical properties

Answer 13

color, density

Question 14

Extrinsic physical properties

Answer 14

mass, volume

Question 15

period (on table)

Answer 15

horizontal row

Question 16

groups (on table)

Answer 16

vertical column

Question 17

Metal characteristics

Answer 17

tend to form cations, very ductile and malleable, good electrical and thermal conductors

Question 18

Nonmetal characteristics

Answer 18

tend to form anions; wide variety of physical properties

Question 19

Metalloids

Answer 19

look like metals, but have electrical conductivity intermediate between metals and nonmetals…they are semiconductors.

Question 20

What is an ion?

Answer 20

an atom or group of atoms with a net electrical charge

Question 21

Anion

Answer 21

negatively charged ions that are formed by the addition of electrons

Question 22

Cation

Answer 22

positively charged ions that are formed by the loss of electrons

Question 23

What is a hydrate?

Answer 23

Compounds that absorb water into their crystalline structure. Formation of a hydrate is generally reversible.

Question 24

Ionic compound

Answer 24

metal plus one or more nonmetals

Question 25

Molecular compounds

Answer 25

contain only nonmetals

Question 26

Is glucose (C6H12O6) ionic or molecular?

Answer 26

molecular (contains only nonmetals)

Question 27

What is the difference between a period and a group?

Answer 27

A period is a horizontal row that represents filling electron quantum energy levels. A group is a vertical column that contains elements with similar chemical and physical properties.

Question 28

Ammonium ion

Answer 28

NH₄⁺

Question 29

Hydronium ion

Answer 29

H₃O⁺

Question 30

Bicarbonate ion

Answer 30

HCO₃^-

Question 31

Bisulfate

Answer 31

HSO₄^-

Question 32

Hydroxide ion

Answer 32

OH^-

Question 33

Acetate ion

Answer 33

C₂H₃O₂^-

Question 34

Cyanide ion

Answer 34

CN^-

Question 35

Dihydrogenphosphate ion

Answer 35

H₂PO₄^-

Question 36

Sulfate ion

Answer 36

SO₄^2-