Predicting Ionic Charges and Formulas from Elements

20) Which of the following compounds would you expect to be ionic?

• A)   SF6
• B)   H2O
• C)   CO2
• D)   NH3
• E)   CaO

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NGSS.HS-PS1-1

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21) Which of the following compounds would you expect to be ionic?

• A)   H2O
• B)   CO2
• C)   SrCl2
• D)   SO2
• E)   H2S

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NGSS.HS-PS1-1

22) Which pair of elements is most likely to form an ionic compound with each other?

• A)   barium, chlorine
• B)   calcium, sodium
• C)   oxygen, fluorine
• D)   sulfur, carbon
• E)   nitrogen, hydrogen

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NGSS.HS-PS1-1

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23) Of the choices below, which one is not an ionic compound?

• A)   PCl5
• B)   CrCl6
• C)   RbCl
• D)   PbCl2
• E)   NaCl

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NGSS.HS-PS1-3

24) What is the formula of the compound formed between strontium ions and nitrogen ions?

• A)   SrN
• B)   Sr3N2
• C)   Sr2N3
• D)   SrN2
• E)   SrN3

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NGSS.HS-PS1-1

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25) Magnesium reacts with a certain element to form a compound with the general formula MgX. What would the most likely formula be for the compound formed between Lithium and element X?

• A)   Li2X
• B)   LiX2
• C)   Li2X3
• D)   Li2X2
• E)   LiX

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NGSS.HS-PS1-1

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26) Aluminum reacts with a certain nonmetallic element to form a compound with the general formula AlX. Element X is a diatomic gas at room temperature. Element X must be ______.

• A)   sulfur
• B)   fluorine
• C)   bromine
• D)   nitrogen
• E)   oxygen

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NGSS.HS-PS1-1

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27) Predict the formula of the ionic compound that forms from Calcium and Fluorine.

• A)   CaF2
• B)   C2F
• C)   Ca2 F2
• D)   Ca2F3
• E)   Ca3F2

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NGSS.HS-PS1-1

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28) Predict the formula of the ionic compound that forms from magnesium and fluorine.

• A)   Mg2F3
• B)   MgF
• C)   Mg2F
• D)   Mg3F2
• E)   MgF2

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NGSS.HS-PS1-1

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29) Predict the formula of the ionic compound that forms from magnesium and oxygen.

• A)   Mg2O
• B)   MgO
• C)   MgO2
• D)   Mg2O2
• E)   Mg3O2

Tags

NGSS.HS-PS1-1

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