Elements

Question 1

What is the major difference between the periodic table created by Dmitri Mendeleev and the one created by Henry Moseley?

Revolt · Accepted Answer

Moseley arranged the elements in order of increasing atomic number.

Question 2

A horizontal row of elements in the periodic table is called a .

Revolt · Accepted Answer

period

Question 3

Atoms of elements in the same group have the same .

Revolt · Accepted Answer

number of valence electrons

Question 4

As you move from left to right on the periodic table, the atomic number .

Revolt · Accepted Answer

increases

Elements Answers