Chapter 5

Question 1

Dmitri Mendeleev

Answer 1

Rearranged his periodic cards by density, appearance, and melting point

Question 2

Henry Moseley

Answer 2

His periodic table was arranged by atomic number.

Question 3

Periodic

Answer 3

Describes something that occurs or repeats at regular intervals

Question 4

Periodic Law

Answer 4

The law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements.

Question 5

Period

Answer 5

In chemistry, a horizontal row of elements in the periodic table.

Question 6

Group

Answer 6

A vertical column of elements in the periodic table; elements in group share chemical properties.

Question 7

Alkali Metals

Answer 7

One of the first elements of Group 1 of the periodic table.

Question 8

Alkaline-Earth Metals

Answer 8

One of the elements of Group 2 of the periodic table.

Question 9

Halogen

Answer 9

One of the elements of Group 17 of the periodic table.

Question 10

Noble Gas

Answer 10

One of the elements of Group 18 in the periodic table.