Chemistry: Atomic Structure and Theory Flashcard

Front

What is the Bohr model of the atom?

Back

The Bohr model describes electrons orbiting the nucleus at specific distances and energy levels, absorbing or emitting energy when they jump between these levels.

Front

What particle in the nucleus has no charge?

Back

Neutron.

Front

What is the charge of an electron?

Back

Negatively charged.

Front

Who proposed the plum pudding model of the atom?

Back

J.J. Thomson.

Front

How many neutrons are in a Magnesium atom with an atomic number of 12 and mass number of 24?

Back

12 neutrons.

Front

What is the atomic number of an element?

Back

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

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What is an electron cloud?

Back

A region around the nucleus where electrons are likely to be found, representing the probabilistic nature of electron positions.

Front

What is the difference between an atom and an ion?

Back

An atom is neutral, while an ion has a net charge due to the loss or gain of electrons.

Front

What is the role of protons in an atom?

Back

Protons determine the atomic number and identity of the element.