Chemistry chapter 6.1

Group 2A

Which group on the periodic table is known as the alkaline earth metals?

Nonmetals

Which of the following are poor conductors of heat and electricity?

The missing elements form the lanthanide and actinide series, usually found below the periodic table.

Why do atomic numbers jump by 15 from left to right in the section of the periodic table shown below?

Nonmetal

a gas or dull, brittle solids that are poor conductors of heat and electricity

Halogen

a highly reactive group 17 element

Alkali Metal

an element in group 1 of the periodic table (no hydrogen)

Metalloid

an element that has properties of both metals and nonmetals

Metal

one of the three main classifications of the periodic table

Periodic Law

the statement that there is a periodic repetition of chemical and physical properties of elements when arranged by increasing atomic number

Period

A horizontal row of elements in the periodic table

Alkaline Earth Metals

Group 2

Cl

Halogens are good disinfectants. Which of the following is a halogen?

Representative Element

elements in groups 1, 2, and 13-18 in the periodic table

Transition Element

elements in groups 3-12

Transition Metal

elements in groups 3-12, except lanthanide and actinide elements

Nobel Gas

extremely unreactive group 18 element

Inner Transition Metal

lanthanide and actinide series of elements

Group

vertical columns of elements arranged in order of increasing atomic