Chemistry Chapter 5 "The Periodic Law"

Question 1

Actinide

Answer 1

Are the 14 elements with atomic number from 90 to 103

Question 2

Lanthanide

Answer 2

Are the 14 elements with atomic numbers from 58 to 71

Question 3

Periodic Law

Answer 3

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

Question 4

Periodic table

Answer 4

Is 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 5

Alkali metals

Answer 5

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

Question 6

Alkaline-earth metals

Answer 6

The elements of Group 2 of the periodic table. (Beryllium, magnesium, calcium, strontium, barium, and radium)

Question 7

Halogens

Answer 7

The group of 17 (fluorine, chlorine, bromine, iodine, and astatine)

Question 8

Main-group elements

Answer 8

The p-block elements together with the s-block elements

Question 9

Transition elements

Answer 9

The d-block elements are metals with typical metallic properties and are often referred to as transition elements.

Question 10

Anion

Answer 10

A negative ion

Question 11

Atomic radius

Answer 11

May be defined as one-half the distance between the nuclei of identical atoms that are bonded together.

Question 12

Cation

Answer 12

A positive ion

Question 13

Electron affinity

Answer 13

The energy change that occurs when an electron is acquired by a neutral atom is called atom’s electron affinity.

Question 14

Electronegativity

Answer 14

Is a measure of the ability of an atom in a chemical compound to attract electrons.