Counting Atoms and Review

How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

Element or compound?
O₂

• Element
• Compound

Tags

NGSS.MS-PS1-1

Which of the following is a compound?

• Co
• O₂
• C
• CO₂

Tags

NGSS.MS-PS1-1

The red numbers in the image below represent ________

• subscripts
• coefficients
• I don't know, and don't want to try
• None of the answers are correct

Tags

NGSS.MS-PS1-1

The blue numbers in the image below represent ________

• I don't know, and don't want to try
• coefficients
• subscripts
• none of the answers are correct

Tags

NGSS.HS-PS1-7

The substances at the beginning of a chemical equation are called the ____

• product
• yield
• chemical symbol
• reactants

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

In the equation,          2Mg + O₂ ---> 2MgO, which are the reactants?

• Mg and O
• MgO
• Mg and MgO
• O and MgO

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Name ALL the evidences that show a chemical reaction has occurred.

• color, gas, light
• light, precipitate, odor, 
• color, gas, light, temperature, precipitate
• temperature, smell, light, conductivity, taste

Tags

NGSS.MS-PS1-2

In a chemical reaction, everything to the rightof the arrow is called ______________.

• Products
• Yields
• Molecules
• Reactants

Tags

NGSS.MS-PS1-5

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

Tags

NGSS.MS-PS1-1