6.3

Question 1

Vertical groups in the periodic table are based on?

Answer 1

Characteristics

Question 2

Horizontal groups in the periodic table are based on?

Answer 2

Increasing mass

Question 3

Who is Mendeleev

Answer 3

A Russian chemist that formulated the periodic law and created a version of the periodic table

Question 4

Noble gases

Answer 4

a group of non-reactive elements in Group 18 of the periodic table, unreactive and found in the earth’s atmosphere

Question 5

Why did Mendeleev leave gaps in the periodic table?

Answer 5

He left gaps when the properties of the next-heaviest element did not match the properties above it in the column