Atoms and the Periodic Table 2020 (Graded)

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element. It consists of protons, neutrons, and electrons.

Front

What are protons?

Back

Protons are positively charged subatomic particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutrons are neutral subatomic particles found in the nucleus of an atom. They have no charge.

Front

What are electrons?

Back

Electrons are negatively charged subatomic particles that orbit the nucleus of an atom.

Front

What is the atomic number?

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?

Back

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

Front

What is a valence electron?

Back

Valence electrons are the electrons in the outermost energy level of an atom that are involved in chemical bonding.

Front

How many energy levels can an atom have?

Back

An atom can have multiple energy levels, with the first level holding up to 2 electrons, the second level up to 8, and so on.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of elements organized by increasing atomic number and grouped by similar chemical properties.

Front

What is a group in the periodic table?

Back

A group is a column in the periodic table that contains elements with similar chemical properties and the same number of valence electrons.