Help! 1) Predict the formula of the ionic compound that would result from combin

Question

Help!

1) Predict the formula of the ionic compound that would result from combining the monatomic ions formed by each pair of elements. Match each pair of elements to the appropriate formula, where M represents a monatomic cation and X represents a monatomic anion.

Match the letter

Be and O   
Ga and O   
   Na and S   
Ba and Cl   
Al and F

2) The formulas for several ionic compounds are shown below, with X representing an unidentified main group element. Match each formula with the group to which the element X must belong.

NH4X   
X2(SO4)3   
X2SO4   
XF   
KX   

Match the letter

  8A(18)

3) Match each element with the full ground-state electron configuration of the monatomic ion it is most likely to form.

Match the letter

Mg
S
Sr
F
Li
N

4) Match each transition metal ion with its condensed ground-state electron configuration.

Mo3+
Ti2+
Cd2+
Au3+
Cr3+
V3+

Match the letter

Be and O   
Ga and O   
   Na and S   
Ba and Cl   
Al and F

2) The formulas for several ionic compounds are shown below, with X representing an unidentified main group element. Match each formula with the group to which the element X must belong.

NH4X   
X2(SO4)3   
X2SO4   
XF   
KX   

Explanation / Answer

1)
Be and O   
Be forms Be+2
O forms O-2

the compound will be BeO
Answer: E

Ga and O
compound will be Ga2O3
Answer: A

Na and S   
Na forms Na+1
S forms S-2
compound will be Na2S
Answer: C

Ba and Cl   
Ba forms Ba+2
Cl forms Cl-1
compound will be BaCl2
Answer: D

Al and F
Al forms Al+3
F forms F-1
compound will be AlF3
Answer: B

i am allowed to answer only 1 question at a time

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