Elements, Mixtures and Compounds

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

• Element
• Mixture
• Compound
• Solids

What cannot be broken down into other substances?

• Compound
• Mixture
• Solids
• Element

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

• mixture
• compound
• physical

Which of the following formulae represents an element?

• H₂O
• H₂
• NaCl
• CaCO₃

Tags

NGSS.MS-PS1-1

Which of the following is not a compound?

• HCl
• Cl
• NaCl
• CO2

Tags

NGSS.MS-PS1-1

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

• isotope
• plastic
• atom
• metal

In general, metals are _____. 

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

Tags

NGSS.MS-PS3-3

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

How many ATOMS are there in TOTAL in:
H₂SO₄

• 6
• 5
• 7
• 3

Tags

NGSS.MS-PS1-1