The Atom

Question 1

Define mass defect [1 mark]

Answer 1

mass of atom ≤ mass of protons + neutrons + electrons

Question 2

What is mass converted to when its lost? [1 mark]

Answer 2

Mass is converted to energy

Question 3

Define Binding Energy [1 mark]

Answer 3

Energy/Work required to separated an atom into its constituent parts

Question 4

Define u (atomic mass unit)

Answer 4

1/12 mass of carbon 12

Question 5

Recite formula to calculate binding energy [1 mark]

Answer 5

E = mc²

Question 6

To use E = mc² u needs to be converted into kg. What steps can be taken to skip that? [

Answer 6

1. u to MeV (Mega electron Volts) = multiply u by 931.3
2. MeV to Joules = divide MeV by 1.61 x 10^-13