Please help me, I don't understand, thanks in advance.
Question 1 (Multiple Choice Worth 2 points)
Which of the following is a possible formula unit?
Li3B
ClO2
LiCl
PbN
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Question 2 (Essay Worth 3 points)
What is the formula of a compound formed between iodine (I) and calcium (Ca)?
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Question 3 (Multiple Choice Worth 2 points)
When nitrogen and magnesium form an ionic bond, what is the formula?
N3Mg2
N2Mg3
Mg2N3
Mg3N2
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Question 4 (Multiple Choice Worth 2 points)
What is the charge of an oxide ion?
2+
3+
2-
3-
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Question 5 (Multiple Choice Worth 2 points)
What subscripts are needed to complete the formula unit Li_N_?
1,1
3,1
1,3
3,3
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Question 6 (Multiple Choice Worth 2 points)
Which of the following would form a cation?
Ne
Li
O
I
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Question 7 (Multiple Choice Worth 2 points)
Which of the following is not a correct formula? (You may select more than one answer)
Ba2O
Ca3N2
KCl
LiS
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Question 8 (Multiple Choice Worth 2 points)
Which of the following atoms would lose three electrons to empty its valence energy level?
Al
S
N
Sc
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Question 9 (Essay Worth 3 points)
What is the resulting formula unit when aluminum (Al) and phosphorus (P) bond?
1 Answer
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1
formula units is the smallest possible unit for an ionic compound. as atoms to an element or molecules to a covalent compound/
LICl
2/
calcium will always give two elctrons. but iodine can recieve only one. therefore two atoms of iodine react with one atom of calcium to give CaI2
3/
Mg3N2
4/
-2
9/
aluminium phosphide AlP