Review Atomic History, structure, Bohr and Lewis Dot Models

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds with other atoms.

Front

How many valence electrons does carbon have?

Back

Carbon has 4 valence electrons.

Front

What is a neutron?

Back

A neutron is a subatomic particle that has no electric charge and is located in the nucleus of an atom.

Front

What is a proton?

Back

A proton is a subatomic particle with a positive charge that is found in the nucleus of an atom.

Front

What determines the atomic number of an element?

Back

The atomic number is determined by the number of protons in the nucleus of an atom.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed during chemical reactions or physical changes.

Front

What is the Bohr model of the atom?

Back

The Bohr model describes the atom as having a nucleus surrounded by electrons that orbit in fixed paths or energy levels.

Front

What is the Lewis Dot Model?

Back

The Lewis Dot Model represents the valence electrons of an atom as dots around the element's symbol.

Front

What is the mass number of an atom?

Back

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

Front

What is an electron?

Back

An electron is a subatomic particle with a negative charge that orbits the nucleus of an atom.