Atomic Structure and Molecules

What is the smallest unit of matter that makes up everything around us?

• Molecule

• Atom

• Cell

• Compound

Where are protons and neutrons located in an atom?

• Electron cloud

• Nucleus

• Outer shell

• Orbitals

How many protons does oxygen have if its atomic number is 8?

• 6

• 7

• 8

• 9

What is the area called where electrons orbit around the nucleus?

• Nucleus

• Electron cloud

• Proton field

• Neutron zone

What is the charge of a neutron?

• Positive

• Negative

• Neutral

• Variable

Which of the following is an example of an element?

• Water

• Oxygen

• Sugar

• Carbon dioxide

What is the atomic number of hydrogen?

• 0

• 1

• 2

• 3

What happens to an atom when it loses electrons?

• It becomes a positive ion

• It becomes a negative ion

• It remains neutral

• It becomes an isotope

What is the mass number of Sodium (Na) if it has 11 protons and 12 neutrons?

• 11

• 12

• 23

• 24

What is the charge of an ion that gains electrons?

• Positive

• Negative

• Neutral

• Double positive