Periodic Table Vocabulary Flashcard

Front

What is the atomic mass?

Back

The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu). For example, the atomic mass of Beryllium is approximately 9.0122 amu.

Front

What is a Periodic Table?

Back

A Periodic Table is a chart of elements arranged in order of increasing atomic number, which shows the relationships between different elements.

Front

What is an electron?

Back

An electron is a tiny, negatively charged particle that orbits the nucleus of an atom in electron clouds or shells.

Front

What is a chemical symbol?

Back

A chemical symbol is a one or two-letter abbreviation used to represent an element. For example, the chemical symbol for Beryllium is Be.

Front

What is an element?

Back

An element is a pure substance made of only one type of atom that cannot be broken down into simpler substances.

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons, and it is positively charged.

Front

What are protons?

Back

Protons are positively charged particles found in the nucleus of an atom. The number of protons determines the atomic number of an element.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom. They have no charge and contribute to the atomic mass.

Front

What is atomic number?

Back

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

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements chemically bond together in fixed proportions.