Flashcardizz: Atomic Theory and Structure Review Game

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 the mass number of an atom?

Back

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

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom, contributing to the mass but not the charge.

Front

What is the role of electrons in an atom?

Back

Electrons are negatively charged particles that orbit the nucleus and are involved in chemical bonding.

Front

Who proposed the 'plum pudding' model of the atom?

Back

J.J. Thomson proposed the 'plum pudding' model, which suggested that electrons are embedded in a positively charged 'soup'.

Front

What is the electron configuration for the first 10 elements?

Back

The electron configuration for the first 10 elements is: 1s² 2s² 2p⁶ 3s².

Front

What is the significance of the nucleus in an atom?

Back

The nucleus contains protons and neutrons, making it the center of mass and positive charge of the atom.

Front

What is the Bohr model of the atom?

Back

The Bohr model describes electrons orbiting the nucleus in fixed paths or energy levels.

Front

What is the maximum number of electrons in the first three energy levels?

Back

The maximum number of electrons in the first three energy levels is 2 in the first, 8 in the second, and 8 in the third (2-8-8 rule).

Front

What did Rutherford's gold foil experiment demonstrate?

Back

Rutherford's gold foil experiment demonstrated that atoms have a small, dense nucleus and are mostly empty space.