The Periodic Table

History

100

When was the periodic table first developed?

1) 1789       2) 1869      3) 1913

1869

200

Who was known as the father of modern chemistry?

Antoine Lavoisier

300

Who developed the first periodic table?

Dmitri Mendeleev

Groups

100

How many groups are there in the modern periodic table?

18

200

What are group 1 elements called

Alkali Metals

300

Going from left-->right in groups, what happens to the atomic radius of elements?

Increases

Periods

100

How do the elements in a period change as you move from left to right?

+ 1 electron in the outer shell

200

How many halogens are there in each period?

1

300

Which periods contain transition metals?

4-7