Atom, Molecules, and Compounds

All matter is made of...

• energy

• air

• atoms

• chemistry

The positive particles of an atom are...

• electrons

• neutrons

• atoms

• protons

The central region of an atom where its neutrons and protons are is called the...

• nucleus

• core

• electron orbital

• center

Neutrons are

• negative

• neutral

• positive

• cows

Electrons are...

• negative and in the nucleus

• not in an atom

• positive and at the edge of the atom

• negative and at the edge of the atom

Most of the atom is filled with...

• electrons

• the nucleus

• empty space

• protons

Which of the following is not a compound?

• HCl

• NaCl

• Cl

• CO2

Which one only has one type of atom In it.

• Element

• Compound

Which of the following represents an element?

• H₂O

• NaCl

• H₂

• CaCO₃

How many protons are in this element?

• 47

• 117

• 107.87