Unit 6 Chemistry Test

Matter can undergo physical or chemical changes. Which of these are examples of physical changes? Select TWO correct answers.

• Rusting Iron

• Freezing a popsicle

• Breaking an egg

• Burning Wood

• Cooking an egg

The formula for glucose is C₆H₁₂O₆. How many elements does glucose contain?

• 12

• 6

• 24

• 3

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NGSS.MS-PS1-1

A researcher wants to experiment with an element that reacts like phosphorus (P) but has a greater atomic mass. Which element should the researcher select for the experiment?

• 
  Silicon (Si)

• Arsenic (As)

• 
  Sulfur (S)

• Nitrogen (N)

The image shows the periodic grid for POTASSIUM. How many PROTONS are found in a potassium atom?

• 19

• 39

• 20

• Impossible to tell

Tags

NGSS.MS-PS1-1

The image shows the periodic grid for POTASSIUM. How many ELECTRONS are found in a potassium atom?

• 19

• 39

• 20

• Impossible to tell

Tags

NGSS.MS-PS1-1

Serotonin is a chemical substance that acts as a neurotransmitter. It helps relay messages in the human brain. The formula for one molecule of serotonin is shown:  

C₁₀H₁₂N₂O

How many total atoms are present in a molecule of serotonin?

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NGSS.MS-PS1-1

Which of the following is the mass number of the atom represented in the graphic? (round to the nearest whole number)

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NGSS.MS-PS1-1

Strontium phosphate, Sr₃(PO₄)₂  is a crystalline substance used in medicine and industry. How many oxygen atoms are represented in the formula for Sr₃(PO₄)₂?

• 4

• 3

• 8

• 2

Tags

NGSS.MS-PS1-1

Which element is this?

• Nickel

• Neon

• Sodium

• Nitrogen

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NGSS.MS-PS1-1

Which element is a metalloid?

• Titanium

• Selenium

• Potassium

• Polonium