Physical Sci Review 7th

Something that takes up space and has mass.

• volume
• matter
• mass
• density

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The smallest part of an element...

• atom
• molecule
• electron

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____________ can join to form molecules.

• atom
• molecule
• electron

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Type of matter made of two or more elements...

• element
• mixture
• compound

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Carbon dioxide is a gas made up of carbon and oxygen.  Carbon dioxide is  a 

• a compound
• an element
• physical change 
• a property 

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A single substance, either an element or a compound , with definite composition and properties is called a ______________

• substance

• pure substance

• molecule

• pure molecule

Which family on the Periodic Table is the least reactive due to having a full outer shell of electrons?

• Halogens
• Noble Gases
• Fluorine Group
• Non-Metal Group

The number of __________________ determines an element's identity.

• neutrons
• electrons
• protons
• grams

Postive particle of an atom

• proton
• neutron
• electron
• molecule

How many of each type of atom are in the formula NH₃?

• 1 nitrogen, 3 hydrogen

• 3 nitrogen, 3 hydrogen

• 1 neon, 3 hydrogen

• 1 nitrogen, 3 helium

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