Atomic Structure Part 1

Front

What did Rutherford conclude about the structure of atoms from his gold foil experiment?

Back

Atoms consist mainly of empty space.

Front

What is the atomic number of an element?

Back

The atomic number expresses the number of protons in an atom.

Front

Calculate the net charge of a particle with 10 protons, 12 neutrons, and 13 electrons.

Back

The net charge is -3.

Front

What do isotopes of an element have in common?

Back

Isotopes have the same atomic number.

Front

What is the atomic number of an element with 9 protons?

Back

The atomic number is 9.

Front

Define 'proton'.

Back

A proton is a positively charged particle found in the nucleus of an atom.

Front

Define 'neutron'.

Back

A neutron is a neutral particle found in the nucleus of an atom.

Front

Define 'electron'.

Back

An electron is a negatively charged particle that orbits the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus.

Front

How do you calculate the number of neutrons in an atom?

Back

Number of neutrons = Mass number - Atomic number.