NGSS.MS-PS1-1

(8.5C) A student is studying the ways different elements are similar to one another. Diagrams of atoms from four different elements are shown below.
Which two atoms are of elements in the same group in the periodic table?

• Atom 1 and Atom 2
• Atom 1 and Atom 4
• Atom 2 and Atom 3
• Atom 3 and Atom 4

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How many valence electrons does nitrogen have?

• 3
• 2
• 5
• 1

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What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

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What are the 3 subatomic particles that make-up the atom?

• protons, neutrons, and isotopes
• neutrons, isotopes, and electrons
• positives, negatives, and electrons
• protons, neutrons, and electrons

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The coefficient in  3H₂O is

• 6
• 2
• 3
• 5

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Process that uses the properties of atoms in rocks and other objects to determine their ages 

• relative dating
• radioactive decay 
• absolute dating

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How many atoms of hydrogen are in a sugar molecule with the formula C₆H₁₂O₆

• 12

• 6

• 24

• 18

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How many elements?

H₃PO₄

• 8

• 3

• 7

• 5

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What is a pure substance made of 2 or more elements chemically combined in a specific ratio (Ex. Water)?

• Element

• Compound

• Mixture

• Solution

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This picture represents which of the following?

• element

• mixture

• compound

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