Nuclear reactions 1.3

Question 1

What is an Isotope

Answer 1

Atoms of an element with the same no. of protons but different no of neutrons

Question 2

What is a radioisotope

Answer 2

Unstable isotopes that releases radiation decays to become more stable

Question 3

What are products and reactants? NaOH + HCl—> NaCl +H20

Answer 3

First par(left)= reactants
Second par(right)= products

Question 4

conservation of mass law

Answer 4

If mass of reactants not equal to products (wrong)

Question 5

What is Ionic, covalent and metallic bonding? example for each

Answer 5

Ionic bonding: form between a metal and a non-metal (eg. NaCl)

Covalent bond: form between 2 non-metals (eg. CO)

Metallic bond: forms in a metallic substance (eg. copper wire)

Question 6

What is radiocarbon dating used for?

Answer 6

Used by scientist to determine the age of fossils

Question 7

What is the half life of Carbon 14?

Answer 7

5730 years

Question 8

What is half life

Answer 8

The time it takes for the half life of the nuclei to decay

Question 9

What are the three different types of Nuclear decay? What properties of these nuclear decays?

Answer 9

Alpha:
- 2p+ 2n or has a helium nucleus
- Slow/ low risk of harm
- losses a mass no 4
- loses an atomic no of 2
- stopped by a sheet of paper
- damages DNA and reduces white blood cells, sesceptiable to infections

Beta:
- Move fast
- e- with high energy
- blocked by a sheet of Al
- Neutron is converted into a proton WHICH RELEASES AN E-
- identical to an e-
- occurs when there are two many P or N

Gamma:
- A ray not a particle
- doesn’t change the structure of an atom
- led or a thick slab of concrete can stop the radiation
- no charge
- harmful