The periodic table - Eduqas

1

What name is given to atoms of the same element with different numbers of neutrons?

2

An isotope is written as carbon-14. What does this tell you about the isotope?

3

What is meant by the term 'relative atomic mass'?

4

Neon has two common isotopes: 90% of neon atoms are neon-20 and 10% of neon atoms are neon-22. What is the relative atomic mass of neon?

5

What property of atoms did Mendeleev use to put together his first periodic table?

6

Mendeleev changed the order of some pairs of elements in his periodic table. Why did he make these changes?

7

A modern periodic table arranges atoms in rows and columns. What names are given to these rows and columns?

8

What is the maximum number of electrons that the first electron shell can hold?

9

What is the electron configuration of aluminium (atomic number 13)?

10

Rubidium is an element in group 1 of the periodic table. How many electrons are there in the outer shell of a rubidium atom?