Atomic Structure Review

Front

What is the order of elements on the modern periodic table?

Back

Elements are arranged in order of increasing atomic number.

Front

What is the charge of a proton?

Back

The charge on a proton is positive 1.

Front

What happens when an electron moves from n=4 to n=2?

Back

The electron releases energy.

Front

What did J. J. Thomson conclude from his experiments?

Back

Thomson concluded that atoms contain small negatively charged particles called electrons.

Front

What is the atomic number?

Back

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

Front

What is the mass number of an atom?

Back

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

Front

What is an electron?

Back

An electron is a subatomic particle with a negative charge.

Front

What is a neutron?

Back

A neutron is a subatomic particle with no charge, found in the nucleus of an atom.

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons.

Front

What is the difference between atomic mass and atomic number?

Back

Atomic mass is the weighted average mass of an atom's isotopes, while atomic number is the number of protons.