Ch 5 Vocab

Question 1

Periodic table

Answer 1

An arrangement of the elements in order of their atomic numbers so that elements with similar properties fall in the same column, or group

Question 2

Lanthanides

Answer 2

The 14 elements with atomic numbers from 58 to 71

Question 3

Actinides are the

Answer 3

14 elements with atomic numbers from 90 to 103

Question 4

Alkali metals

Answer 4

The elements of group 1 of the periodic table (lithium, sodium, potassium, rubidium, cesium, and francium)

Question 5

Alkaline-earth metals

Answer 5

The elements of group 2 of the periodic table (beryllium, magnesium, calcium, strontium, barium, radium)

Question 6

Transition elements

Answer 6

D block elements are metals with typical metallic properties

Question 7

Main group elements

Answer 7

P block elements together with the block elements

Question 8

Halogens

Answer 8

Elements of group 17 (fluorine, chlorine, bromine, iodine, astatine)

Question 9

Atomic radius

Answer 9

One half the distance between the nuclei of identical atoms that are bonded together

Question 10

Ion

Answer 10

Atom or group of bonded atoms that has a positive or negative charge

Question 11

Ionization

Answer 11

Any process that results in the formation of an ion

Question 12

Ionization energy IE

Answer 12

Energy required to remove one electron from a neutral atom

Question 13

Electrons affinity

Answer 13

Energy change that occurs when an electron is acquired by a neutral ago.

Question 14

Cation

Answer 14

Positive ion

Question 15

Anion

Answer 15

A negative ion

Question 16

Valence electrons

Answer 16

Electrons available to be lost gained or shared in the formation of chemical compounds

Question 17

Electronegativity

Answer 17

Measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound

Question 18

Periodic law

Answer 18

The physical and chemical properties of the elements are periodic functions of their atomic numbers