Atoms practice

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 atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom.

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 an isotope?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the difference between atomic mass and mass number?

Back

Atomic mass is the weighted average mass of an element's isotopes, while mass number is the total count of protons and neutrons.

Front

How many protons are in a gold atom (Au)?

Back

Gold has 79 protons.

Front

What is the electron configuration of Neon (Ne)?

Back

The electron configuration of Neon is 1s² 2s² 2p⁶.

Front

What is the charge of a neutral atom?

Back

A neutral atom has no charge, meaning it has an equal number of protons and electrons.

Front

How do you determine the number of neutrons in an atom?

Back

To find the number of neutrons, subtract the atomic number from the mass number.

Front

What is the significance of the periodic table?

Back

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