Atoms: Atomic Model and Structure

Front

What is an atom?

Back

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

Front

What are protons?

Back

Protons are positively charged particles found in 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 defines the element.

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 an isotope?

Back

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

Front

How do you calculate atomic mass?

Back

Atomic mass is calculated by taking the weighted average of the masses of an element's isotopes.

Front

What is the significance of the atomic model?

Back

The atomic model helps us understand the structure and behavior of atoms, including how they interact in chemical reactions.

Front

Who proposed the first atomic theory?

Back

John Dalton proposed the first atomic theory in the early 19th century.

Front

What is the difference between mass number and atomic number?

Back

Mass number is the total number of protons and neutrons in an atom's nucleus, while atomic number is just the number of protons.