Atomic Basics

What is the unit of mass for an atom?

neutral subatomic particles are called

electrons are found in the

An atom is the smallest unit of a substance

The number of protons an atom contains is identified by the ____ ____

Water is made of what kind of atoms?

Carbon, C has 6 protons. How many valence electrons does it have?

Valence electrons are located

neutrons are found in the

An element will always have the same number of what?

When an atom loses or gains electrons, the atom is called what?

which of the following is an example of a heterogeneous mixture?

What did Rutherford learn about the atom from his gold-foil experiment

Protons are found in the

where is most of the mass of an atom found?

Which of the following is a homogeneous mixture?

Atomic theory includes

positively charged subatomic particles are called

Atoms of the same element that have different numbers of neutrons are called

The negative charged subatomic particle is called

The sum of the number of protons and neutrons in the nucleus is called

Which listing below shows the proper charges of the subatomic particles?

Which subatomic particles are located inside the nucleus of an atom?

Atoms are 99.99%

Which is biggest