Periodic Table Basics

Front

What is the atomic mass of Boron?

Back

10.81

Front

How many electrons can the first energy shell hold?

Back

2

Front

How many electrons can the second energy shell hold?

Back

8

Front

How many electrons can the third energy shell hold?

Back

18

Front

Which element is in PERIOD 2 of the periodic table?

Back

Beryllium

Front

How many periods are there in the periodic table?

Back

7

Front

How many groups are there in the periodic table?

Back

18

Front

Who created the first periodic table?

Back

Dmitri Mendeleev

Front

What is the definition of a period in the periodic table?

Back

A horizontal row of elements.

Front

What is the definition of a group in the periodic table?

Back

A vertical column of elements.