Atomic Structure and Periodic Table Unit Review

Front

What are isotopes?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons, resulting in different atomic masses.

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 significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons, and is responsible for most of the atom's mass.

Front

Who discovered the electron?

Back

J.J. Thomson discovered the electron in 1897 through his experiments with cathode rays.

Front

What group is Beryllium in on the periodic table?

Back

Beryllium is in Group 2 of the periodic table.

Front

What is the role of neutrons in an atom?

Back

Neutrons contribute to the mass of an atom and help stabilize the nucleus by offsetting the repulsive forces between protons.

Front

What is the electron configuration of Fluorine?

Back

The electron configuration of Fluorine is 1s² 2s² 2p⁵.

Front

What is a chemical element?

Back

A chemical element is a pure substance that cannot be broken down into simpler substances by chemical means and is defined by its atomic number.