History
When was the periodic table first developed?
1) 1789 2) 1869 3) 1913
1869
How many groups are there in the modern periodic table?
18
How do the elements in a period change as you move from left to right?
+ 1 electron in the outer shell
Who was known as the father of modern chemistry?
Antoine Lavoisier
What are group 1 elements called
How many halogens are there in each period?
1
Who developed the first periodic table?
Dmitri Mendeleev
Going from left-->right in groups, what happens to the atomic radius of elements?
Increases
Which periods contain transition metals?
4-7