Chapter 19 - Radioactivity and Nuclear Chemistry

Question 1

occurs when an unstable nucleus emits a particle composed of two protons and two neutrons

Answer 1

alpha decay

Question 2

the sum of the atomic numbers on both sides of a nuclear equation must be equal, and the sum of the mass numbers on both sides must also be equal

Answer 2

just know it :)

Question 3

occurs when an unstable nucleus releases an electron

Answer 3

beta decay

Question 4

a form of electromagnetic radiation, with no charge and no mass

Answer 4

gamma ray emission

Question 5

occurs when an unstable nucleus releases a positron

Answer 5

positron emission

Question 6

the antiparticle of the electron - has the same mass as an electron, but the opposite charge

Answer 6

positron

-if it were to collide with an electron, they would annihilate each other and release energy in the form of gamma rays

Question 7

occurs when a nucleus assimilates an electron from an inner orbital of its electron cloud

Answer 7

electron capture