The Periodic Table and Atomic Structure

Front

What is the nucleus of an atom?

Back

The nucleus is a tiny but very dense, positively charged portion of the atom that holds most of the atomic mass.

Front

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

Back

Number of Neutrons = Atomic Mass - Atomic Number.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What are groups in the Periodic Table?

Back

Groups are the vertical (up and down) columns in the Periodic Table that categorize elements with similar properties.

Front

Where are electrons found in an atom?

Back

Electrons are likely to be found in the electron cloud as they travel around the nucleus.

Front

What is an atomic mass?

Back

Atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

What are periods in the Periodic Table?

Back

Periods are the horizontal rows in the Periodic Table that indicate the number of electron shells in the elements.

Front

What is an electron shell?

Back

An electron shell is a region around the nucleus where electrons are likely to be found.

Front

What is a proton?

Back

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