Elements in the first column of the periodic table are known as "Alkali Metals." These elements, when ionized, have in common:

• oxidation number of 1-
• oxidation number 1+
• oxidation number 2- 
• oxidation number 2+

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Atoms with the same atomic number but different atomic mass are called:

• protypes
• subtypes
• isotopes
• ions

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NGSS.MS-PS1-1

The periodic table notation for nitrogen "N" is shown below. An atom of nitrogen has how many electrons?

• 7
• 8
• 9
• 14

Use the diagram of the periodic table below to answer the following questions. What group has two valence electrons in the outermost energy level

• 2
• 13
• 16
• 19

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How many energy levels are "filled" in a Krypton atom?

• 3
• 4
• 5
• 6

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Sodium forms an ionic bond with chlorine when sodium _______ an electron and Chlorine ______ an electron.

• shares, shares
• loses, gains
• gains, loses
• loses, loses

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NGSS.MS-PS1-1

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Which of the following substances is a base?

• Vinegar
• Ammonia
• lemon juice
• Distilled water

In the periodic table notation below, what information does the number 40.078 tell you.

• # of protons
• # of neutrons
• Atomic number
• Atomic mass

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NGSS.MS-PS1-1

Elements in the same column on the periodic table have similar chemical reactivity because: 

• They contain similar amounts of energy levels
• they have the same number of valence shell electrons
• atoms prefer to have completely full or completely empty valence shells
• they have similar numbers of isotopes

The noble gases, such as helium "He" and xenon "Xe", are non-reactive because:

• They have completely filled their outer electron shells
• they are chemically unstable
• they are unusually large atoms.
• they have been around longest on the Earth

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NGSS.HS-PS1-1

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