Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element, consisting of protons, neutrons, and electrons.

Front

How many protons does an atom with atomic number 25 have?

Back

25 protons.

Front

What is the charge of a neutral atom?

Back

A neutral atom has no overall charge, meaning the number of protons equals the number of electrons.

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 is the oxidation number of elements in Group 17?

Back

The oxidation number of elements in Group 17 is -1.

Front

Which subatomic particle has a positive charge?

Back

Proton.

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 neutrons?

Back

Neutrons are subatomic particles found in the nucleus of an atom that have no charge.

Front

What is the significance of the Periodic Table?

Back

The Periodic Table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What do elements in the same group of the Periodic Table have in common?

Back

Elements in the same group have similar chemical properties and the same number of valence electrons.