atoms and the periodic table

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of elements, organized by increasing atomic number, that shows the relationships between them.

Front

What does the group number indicate on the periodic table?

Back

The group number indicates the number of valence electrons in the outer shell of the elements in that group.

Front

What does the period number indicate on the periodic table?

Back

The period number indicates the number of electron shells in the atoms of the elements in that period.

Front

What are alkali metals?

Back

Alkali metals are the elements found in group 1 of the periodic table, known for being highly reactive and having one valence electron.

Front

What is the nucleus of an atom?

Back

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

Front

What are protons?

Back

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

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom, contributing to its mass.

Front

What are electrons?

Back

Electrons are negatively charged 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.