unit 2 Test

The smallest particle of any element that still has the properties of that element is called

• an atom
• a compound
• a solution
• a mixture

A pure substance that is made from one type of atom is a(n) ______________ .

• Mixture
• Atom
• Element
• Compound

Classify Sulfuric Acid (H₂SO₄) as an element or compound.

• Element
• Compound

TRUE OR FALSE:
Water is an element.

• True
• False

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

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

• nucleus 
• electron cloud
• core 
• center 

Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons 

Most of the mass of an atom is found in the ______.

• nucleus

• proton

• electron cloud

• isotope

electrons have this type of charge?

• negative
• positive
• neutral

These particles orbit around the nucleus of an atom.  What are they called?

• electrons
• protons
• neutrons
• photons