Unit 1 Review Foundations in Chemistry

Carbon is considered an element while carbon dioxide is considered a compound. This is because carbon dioxide is –

• a gas at room temperature.
• made of two different elements.
• given off by green plants.

Tags

NGSS.MS-PS1-1

Use the periodic table to determine the Chemical symbol for Iron.

•  Ir
• FE
• Fe
• I

The horizontal rows on the periodic table are known as

• periods.
• atoms.
• groups or families.
• valence electrons.

Vertical columns in the periodic table are called _________ of elements and have similar properties. 

• groups
• periods

What is H₂SO₄ 
 made up of?

• 2 hydrogen, 1 sulfur, 4 oxygen
• 1 hydrogen, 2 sulfur, 4 oxygen
• 2 hydrogen & 4 sodium
• 1 hydrogen & 6 sodium

Tags

NGSS.MS-PS1-1

An element is made up of only one kind of _____.

• isotope
• plastic
• atom
• metal

Mixtures are separated through ___________changes.

• mixture
• compound
• physical

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

• mixture
• compound
• physical

In general, metals are _____. 

• poor conductors of heat
• brittle
• poor conductors of electricity 
• good conductors of heat

Tags

NGSS.MS-PS1-4

Which of the following represents an element?

• H₂O
• H₂
• NaCl
• CaCO₃