Elements

Question 1

What does every atom have in terms of protons?

Answer 1

• Every atom of a particular element has the same number of protons

Question 2

What must be remembered about two elements together?

Answer 2

• That they have the same number of protons in their atoms

Question 3

What do all atoms contain?

Answer 3

• The same number of protons as electrons which means they have no overall charge

Question 4

Define ‘Isotopes’

Answer 4

• Different atoms of an element with the same number of protons and electrons but different numbers of neutrons

Question 5

The way in which electrons are arranged is called what?

Answer 5

• It’s electronic configuration

Question 6

Define ‘Electronic Configuration’

Answer 6

• The arrangement of electrons in shells around the nucleus of an atom

Question 7

What can the first shell contain for the first 20 elements?

Answer 7

• Up to two electrons

Question 8

What can the second and third shell contain?

Answer 8

• They can both hold up to eight electrons

- Sometimes the third can hold more

Question 9

Work out number in each shell of sodium

Answer 9

• Atomic number of 11

- Two in first, eight in second and one in third