Atomic Structure

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

This guy did a thought experiment in which he divided matter repeatedly until it reached a particle that can not be divided. He named it the atom.

• Artistotle
• Dalton
• Democritus
• Thomson

This guy rejected the atom and believed that everything was made of 4 basic substances: earth, water, air, and fire. His theory was accepted for almost 2000 years.

• Democritus
• Armaggedon
• Hercules
• Aristotle

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