Chapter 2

Question 1

An element from Group 1A, with the exception of H (i.e., Li, Na, K, Rb, Sc, and Fr)

Answer 1

Alkali Metal

Question 2

An element from Group 2A (Be, Mg, Ca, Sr, Ba, and Ra)

Answer 2

Alkaline Earth Metal

Question 3

A helium ion with +2 charge

Answer 3

Alpha particle

Question 4

The basic unit of an element that can enter into a chemical combination.

Answer 4

Atom

Question 5

Measured in (amu)s.

Answer 5

Atomic mass

Question 6

The number of protons in the nucleus of each atom of an element.

Answer 6

Atomic number (Z)

Question 7

The mass of the average natural occurring mixture of isotopes.

Answer 7

Average Atomic Mass

Question 8

An electron

Answer 8

Beta particle

Question 9

Radiation (electron beams) emitted from the negatively charged plate in an evacuated tube when a high voltage is applied.

Answer 9

Cathode rays

Question 10

Elements in Group 6A (O, S, Se, Te, and Po)

Answer 10

Chalcogens

Question 11

A negatively charged subatomic particle found outside the nucleus of all atoms

Answer 11

Electron

Question 12

A substance that cannot be separated into simpler substances by chemical means

Answer 12

Element

Question 13

The elements in a vertical column of the periodic table

Answer 13

Group

Question 14

The elements in Group 7a (F, Cl, Br, I, and At)

Answer 14

Halogens

Question 15

Atoms that have the same atomic number (Z), but different mass numbers (A).

Answer 15

Isotope

Question 16

The number of neutrons and protons present in the nucleus of an atom of an element.

Answer 16

Mass number (A)

Question 17

Element with a tendency to lose electrons located left of the zigzag line on the periodic table.

Answer 17

Metal

Question 18

Elements with properties intermediate between metals and nonmetals.

Answer 18

Metalloid

Question 19

The mass in grams of 1 mole of a substance.

Answer 19

Molar mass

Question 20

The amount of a substance that contains as many elementary entities as there are atoms in exactly 12g of carbon-12.

Answer 20

Mole (mol)

Question 21

An electrically neutral subatomic particle with a mass slightly greater than that of a proton.

Answer 21

Neutron

Question 22

Elements in Group 8A (He, Ne, Ar, Kr, Xe, and Rn)

Answer 22

Noble gases

Question 23

Element with a tendency to gain electrons; located in the upper right portion of the periodic table.

Answer 23

Nonmetal

Question 24

Protons and neutrons

Answer 24

Nucleons

Question 25

The central core of the atom that contains the protons and neutrons

Answer 25

Nucleus

Question 26

A horizontal row of the periodic table.

Answer 26

Period

Question 27

A positively charged particle in the nucleus of an atom.

Answer 27

Proton

Question 28

The emission and transmission of energy through space in the form of waves.

Answer 28

Radiation

Question 29

The spontaneous emission of particles or radiation from unstable nuclei.

Answer 29

Radioactivity

Question 30

An element that has, or readily forms one or more ions that have, and incompletely filled d subshell (Groups 3B to 8B or Group 1B)

Answer 30

Transition elements

Question 31

The elements in Group 1B and Groups 3B to 8B

Answer 31

Transition metal

Question 32

Electromagnetic radiation emitted when cathode rays are directed to glass or metal.

Answer 32

X rays