The Periodic Table

Question 1

How did Mendeleev arrange the periodic table?

Answer 1

Mendeleev arranged elements with similar properties together.

He also left gaps in the table for elements that had not yet been discovered. Once these elements were discovered, they were placed in their correct positions.

Question 2

What side are metals in the periodic table? What side are non-metals? what comes in between?

Answer 2

Metals - left
Non-metals - right
Transitional metals - middle

Question 3

What are the rows in the periodic table called? What do they tell us?

Answer 3

They are called periods and they tell us how many shells each element has.

Question 4

What are the columns in the periodic table called? What do they tell us?

Answer 4

They are called groups. The group numbers tell us how many electrons there is on the outermost shells.

Question 5

What is an isotope?

Answer 5

Atoms of the same element with the same number of protons but a different number of neutrons.

Question 6

The mass number of an atom is the number of…

Answer 6

protons + neutrons