The correct answer is B. A proton.

Here's why:

A. A neutron: Neutrons have no charge and a mass of 1 atomic mass unit (amu).

B. A proton: Protons have a charge of +1 and a mass of 1 amu.

C. An electron: Electrons have a charge of -1 and a very small mass (approximately 1/1836 amu).

D. A helium nucleus: A helium nucleus consists of 2 protons and 2 neutrons, so it has a charge of +2 and a mass of 4 amu.

Question

The correct answer is B. A proton.

Here's why:

A. A neutron: Neutrons have no charge and a mass of 1 atomic mass unit (amu).

B. A proton: Protons have a charge of +1 and a mass of 1 amu.

C. An electron: Electrons have a charge of -1 and a very small mass (approximately 1/1836 amu).

D. A helium nucleus: A helium nucleus consists of 2 protons and 2 neutrons, so it has a charge of +2 and a mass of 4 amu.

Knowee AI · Accepted Answer

The correct answer is B. A proton.

Here's why:

A. A neutron: Neutrons have no charge and a mass of 1 atomic mass unit (amu).

B. A proton: Protons have a charge of +1 and a mass of 1 amu.

C. An electron: Electrons have a charge of -1 and a very small mass (approximately 1/1836 amu).

D. A helium nucleus: A helium nucleus consists of 2 protons and 2 neutrons, so it has a charge of +2 and a mass of 4 amu.

Which of the following has a charge of +1 and a mass of 1 amu ?A A neutron B A proton C An electron D A helium nucleus