Atomic Structure and Periodic Table Unit Review

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is a neutron?

Back

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

Front

What is the mass number of an atom?

Back

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

Front

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

Back

Number of neutrons = Mass number - Atomic number.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of elements organized by increasing atomic number, showing periodic trends.

Front

What are metals?

Back

Metals are elements that are typically shiny, good conductors of heat and electricity, and malleable.

Front

Who proposed the planetary model of the atom?

Back

Niels Bohr proposed the planetary model of the atom, where electrons orbit the nucleus in defined paths.

Front

What is an isotope?

Back

An isotope is a variant of an element that has the same number of protons but a different number of neutrons.

Front

What is the significance of the nucleus in an atom?

Back

The nucleus contains protons and neutrons, making up most of the atom's mass and determining its identity.