nuclear chemistry

Question 1

Radiation decay involves

Answer 1

changes in the nuclei of atoms

Question 2

Unstable nuclei can become more stable nuclei by giving out

Answer 2

alpha, beta or gamma

Question 3

Alpha particles consist of

Answer 3

2 protons and 2 neutrons and carry a double positive charge

Question 4

Range of alpha

Answer 4

only a few centimeters and are stopped by a piece of paper

Question 5

Alpha particles will be attracted towards a

Answer 5

negatively charged plate

Question 6

What are beta particles

Answer 6

electrons ejected from the nucleus of an atom

Question 7

range of beta

Answer 7

They are able to travel over a metre in air and can be stopped by a thin sheet of aluminium

Question 8

Beta particles will be attracted

Answer 8

towards a positvley charged plate

Question 9

Gamma rays

Answer 9

are electromagnetic waves within a nucleus of an atom

Question 10

Range of Gamma Rays

Answer 10

Travel great distances. Stopped by barriers made of materials such as lead or concrete

Question 11

Gamma rays are not

Answer 11

deflected by an electric field

Question 12

The sum of the atomic numbers on the left side of the reaction arrow

Answer 12

is equal to the sum of the atomic number of the right of the reaction arroq=w

Question 13

The sum of the mass numbers on the left side of the reaction arrow

Answer 13

is equal to the sum of the mass number of the right of the reaction arroq=w

Question 14

what is the half life

Answer 14

the time for the half of the nuclei of a particular isotope to decay

Question 15

The half life of an isotope is a

Answer 15

constant

Question 16

radioactive isotopes can be used to

Answer 16

date materials

Question 17

radioisotopes have a range of uses in

Answer 17

medicine and in industry