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. It consists of a nucleus containing protons and neutrons, surrounded by electrons.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of chemical elements, organized by increasing atomic number, which reflects the structure of atoms.

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 a proton?

Back

A proton is a positively charged subatomic particle found in the nucleus of an atom.

Front

What is a neutron?

Back

A neutron is a neutral subatomic particle found in the nucleus of an atom, contributing to the atomic mass.

Front

What is an electron?

Back

An electron is a negatively charged subatomic particle that orbits the nucleus of an atom.

Front

What are valence electrons?

Back

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

Front

What does the period of an element indicate?

Back

The period of an element indicates the number of electron shells surrounding the nucleus.

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.

Front

What is the significance of the element symbol?

Back

The element symbol is a one or two-letter abbreviation used to represent an element in chemical formulas.