Nuclear

Question 1

What is strong force and electric force?

Answer 1

Strong force - attraction at short range, keeps nucleus together
Electric force - repulsion at long range, “shoots” particles from nucleus in radioactive materials

Question 2

What is alpha particle emission?

What is it stopped by?

Answer 2

A helium nucleus is released by an atom. 2 protons 2 neutrons are lost.
A piece of paper

Question 3

What is beta particle emission?

What is it stopped by?

Answer 3

An electron is created by a neutron transforming into a proton. Mass number doesn’t change, a proton is gained.
Aluminum foil

Question 4

What is positron emission?

Answer 4

A positron is emitted when a proton transforms into a neutron. Mass number doesn’t change, a proton is lost.

Question 5

What is electron capture?

Answer 5

An electron falls into the nucleus and reacts with a proton to form a neutron. Mass number doesn’t change, a proton is lost.

Question 6

What is the equation for half-life?

Answer 6

T = (-1/K)ln(m end/m start)
T = total time
K = (.693/half-life)