The Structure of the Atom – Module 3 Test

Front

What is the mass and charge of a neutron?

Back

A neutron has a mass nearly equal to that of a proton and has no electrical charge.

Front

What did Rutherford's gold foil experiment conclude about the atom?

Back

The atom is mostly empty space, has a small dense nucleus, and the nucleus is positively charged.

Front

How many protons are in an atom with an atomic number of 5?

Back

5 protons.

Front

What is the composition of the nucleus according to Rutherford's model?

Back

The nucleus is composed of positively charged protons.

Front

What is the average atomic mass of silver?

Back

107.8677 amu.

Front

Define an atom.

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What are subatomic particles?

Back

Subatomic particles are the particles that make up an atom, including protons, neutrons, and electrons.

Front

What is the charge of a proton?

Back

A proton has a positive electrical charge.

Front

What is the charge of an electron?

Back

An electron has a negative electrical charge.

Front

What is the role of neutrons in the nucleus?

Back

Neutrons help stabilize the nucleus by offsetting the repulsive forces between positively charged protons.