Atoms and Periodic Table

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

Which subatomic particle has a negative charge?

Back

The electron is the subatomic particle that has a negative charge.

Front

What do elements in the same group of the periodic table have in common?

Back

Elements in the same group have the same number of valence electrons.

Front

Which element is found in group 2 of the periodic table?

Back

Beryllium is found in group 2 of the periodic table.

Front

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

Back

Number of neutrons = Atomic mass - Atomic number.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (it is neutral).

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number and properties, showing trends in behavior.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

What are valence electrons?

Back

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

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances and is made up of only one type of atom.