LT1.1 Test Review

The smallest whole piece of a substance

• atom

• electron

• proton

• shell

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Subpart of an atom with a positive charge

• proton

• neutron

• electron

• element

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Where protons and neutrons are located

• atom's nucleus

• atom's electron cloud of shells

• atom's edge

difference between atoms and molecules

• molecules are made of individual atoms

• atoms are made of individual molecules

• there is no difference

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In the molecule 3H₂O, how many hydrogen atoms are present?

• 6

• 2

• 3

• 1

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In the molecule 6NaOH, how many oxygen atoms are present?

• 6

• 1

• 18

• 5

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How many TOTAL atoms exist in the molecule CO₂?

• 1

• 2

• 3

• 6

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How many TOTAL atoms exist in the formula 5H₂O₂?

• 2

• 5

• 4

• 20

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Columns on the Periodic Table of Elements shows us...

• the number of electron shells present in the electron cloud

• the number of valence electrons

• the number of protons

• the number of atoms in a molecule

How many valence electrons exist in this atom?

• 3

• 7

• 17

• 35

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NGSS.MS-PS1-1