The Periodic Table

Question 1

How did Mendeleev arrange the periodic table with elements known at that time?

Answer 1

In order of increasing atomic mass. He grouped elements with similar chemical properties

Question 2

How did Mendeleev use his table to predict the existence and properties of elements that had not been discovered yet?

Answer 2

He left gaps from undiscovered elements. He predicted the mass and chemical properties according to other elements in the group

Question 3

What links the number of outer electrons in an atom with its position on the periodic table?

Answer 3

Number of outer e⁻ = the group number

Question 4

What links the number of shells an atom has with its position on the periodic table?

Answer 4

The number of occupied e⁻ shells = the group number

Question 6

The name given to : Group 1

Answer 6

Alkali metals

Question 7

The name given to : Group 7

Answer 7

Halogens

Question 8

The name given to : Group 0

Answer 8

Noble gases