Chemistry 2019

A beta particle is

• photon

• electron

• helium nucleus

• hydrogen nucleus

What is the change in atomic number caused by the emission of gamma radiation?

• decreases by 2

• decreases by 1

• remains the same

• increases by 1

What is the change in atomic mass number when an atom emits an alpha particle?

• decreases by 2

• decreases by 4

• increases by 2

• increases by 4

What is the change in atomic mass when an atom emits a beta particle?

• decreases by 2

• decreases by 1

• remains the same

• increases by 1

What is the change in atomic number when an atom emits an alpha particle

• decreases by 2

• decreases by 1

• increases by 1

• increases by 2

What symbol is used for beta radiation?

• 0/0 e

• 0/-1 e

• -1/0 e

• -1/-1 e

What particle decomposes to produce the electron of beta radiation?

• proton

• neutron

• electron

• positron

What particle does argon-39 (atomic number 18) emit when it decays to potassium39 (atomic number 19)?

• neutron

• electron

• proton

• alpha particle

How does an atom with too many neutrons relative to protons undergo radioactive decay?

• by emitting an alpha particle

• by emitting a beta particle

• by emitting gamma radiation

• by emitting X radiation

What does the band of stability for atomic nuclei refer to?

• the ration of protons to electrons

• the ratio of neutrons to protons

• the ratio of beta particles to neutrinos

• the ratio of alpha particles to beta particles