Alpha Decay

Question 1

Occurs when unstable loses a particle composed of

Answer 1

2 protons, 2 neutrons

Question 2

Alpha particles are identical to the _ nuclei

Answer 2

Helium-4

Question 3

Alpha decay changes an atom into atom with 2 less atomic number and

Answer 3

Emits helium (alpha particle)

Question 4

Original atom in alpha decay is called

Answer 4

Parent nuclide

Question 5

Product of decay is called (new atom)

Answer 5

Daughter nuclide

Question 6

Nuclear reactions are represented by

Answer 6

Nuclear equations

Question 7

Nuclear equations are always

Answer 7

Balanced

Question 8

Sum of mass # and atomic # equal

Answer 8

He 2 + Th 90 = U 92

He 4 + Th 234 = U 238

Question 9

Determine parent nuclide by

Answer 9

Adding atomic number by 2 and mass number by 4