Question

CHEMISTRY

Which of the following properties of an element is least likely to change with beta decay?

A. the mass number
B. the period number
C. the atomic number
D. the name of the element

When a nucleus has too many protons, it can absorb an electron and create _________.

A. a proton
B. a neutron
C. an electron
D. an alpha ray

Which of the following occurs in beta decay?

A. A neutron of an atom emits a high energy proton.
B. A neutron of an atom emits a high energy electron.
C. An electron of an atom emits a high energy proton.
D. A neutron of an atom emits a second high energy neutron.

What kind of ray is given off after electron capture?

A. a beta ray
B. a delta ray
C. an alpha ray
D. a gamma ray

Answer 1

Correct answers :

1 - A) the mass number

2 - B) a neutron

3 - B) a neutron of an atom emits a high energy electron

4 - D) a gamma ray

Hope this helps,

Davinia.

Answer 2

A, B, B, D Protons and neutrons have the same mass as far as mass number is concerned. A proton has a postive charge, and cancels that charge by absorbing an electron.