Year 8 Atoms

The very first element on the periodic table is:

• Hydrogen
• Oxygen
• Sodium
• Neon

This is the part of the atom in which the neutrons and protons are located.

• orbital
• energy level
• nucleus
• electron cloud

These are the positively charged particles, found in the nucleus of an atom.

• electrons
• neutrons
• protons
• quarks

On the periodic table, the atomic number tells you

• the mass
• the charge
• the number of neutrons
• the number of protons

The mass of the atom comes from which two particles?

• muons and glueons
• electrons and neutrons
• electrons and protons
• protons and neutrons

Which of the following represents an element?

• H₂O
• H₂
• NaCl
• CaCO₃

What is made up two or more elements that are chemically combined?

• Element
• Mixture
• Compound
• Solids

A combination of substances that are not chemically combined is called a(n)____________. 

• mixture
• compound
• physical

Table salt (sodium chloride) is a(n):

• compound
• element
• mixture
• atom

An atom with atomic number 6 would have how many protons?

• 6
• 12
• 3
• cannot be determined