Question 1 : Which of these elements does not exist as a diatomic molecule?
1. F
2. Ne
3. H
4. I
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Question 2 : What is the formula for potassium sulfide?
1. K₂S
2. K₂S₂
3. KS
4. KS₂
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Question 3 : Which of the following pairs of elements is most likely to form an ionic compound?
1. oxygen and chlorine
2. sodium and aluminum
3. nitrogen and sulfur
4. magnesium and fluorine
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Question 4 : How do atoms achieve noble-gas electron configurations in single covalent bonds?
1. One atom completely loses two electrons to the other atom in the bond.
2. Two atoms share two pairs of electrons.
3. Two atoms share two electrons.
4. Two atoms share one electron.
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Question 5 : What is the formula unit of aluminum oxide?
1. Al₂O₃
2. AlO₃
3. Al₃O
4. AlO
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Question 6 : What is the formula unit of sodium nitride?
1. NaN
2. Na₂N
3. NaN₃
4. Na₃N
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Question 7 : What is the formula for sodium sulfate?
1. NaSO₄
2. Na(SO₄ )₂
3. Na₂ (SO₄ ) ₂
4. Na₂ SO₄
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Question 8 : What is the name of the ionic compound formed from lithium and bromine?
1. lithium bromium
2. lithium bromine
3. lithium bromide
4. lithium bromate
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Question 9 : How many valence electrons are transferred from the nitrogen atom to potassium in the formation of the compound potassium nitride?
1. 0
2. 1
3. 3
4. 2
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Question 10 : Which of the following elements does NOT form an ion with a charge of 1+?
1. fluorine
2. sodium
3. potassium
4. hydrogen
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