Periodicity

Question 1

Atomic radius

Answer 1

The measure of the size of an Atom

Question 2

Alkali metal

Answer 2

Any of the metals in group 1A of the periodic table. They are very reactive, electropositive, monovalent metals forming strongly alkaline hydroxide

Question 3

Alkaline earth metal

Answer 3

Six chemical elements in group 2 of the periodic table

Question 4

Electronegativity

Answer 4

A measure of the tendency of an Adam to attract a bonding pair of electrons.

Question 5

What is a family

Answer 5

Vertical columns and are also referred to as groups.

Question 6

What is a halogen

Answer 6

Any of the elements occupying group 17 of the periodic table. They are reactive nonmetallic elements that form strongly acidic compounds with hydrogen, from which simple salts can be made

Question 7

Ionization energy

Answer 7

The quantity of energy that an isolated gaseous Adam in the ground electronic state must absorb to discharge an electron, resulting in a cation

Question 8

What are actinide series

Answer 8

A series of radioactive metallic elements in group 3 of the periodic table.