Question

Predict the formula and name of a binary compound formed from the following elements: (a) Na and H, (b) B and O, (c) Na and S, (d) Al and F, (e) F and O, (f) Sr and Cl.

Answer 1

Binary compounds are made up of two elements. The predicted binary compounds include Sodium hydride (NaH), Boron trioxide (B2O3), Sodium sulfide (Na2S), Aluminum fluoride (AlF3), Oxygen fluoride (OF2), and Strontium chloride (SrCl2). To form Sodium sulfide, two sodium cations bond with one sulfide anion resulting in the formula Na2S.

Step-by-step explanation:

The formula and name of a binary compound indicate the combination of two elements. Here are the predictions for the binary compounds:

1. Sodium hydride (NaH), formed from Na and H.
2. Boron trioxide (B2O3), formed from B and O.
3. Sodium sulfide (Na2S), formed from Na and S.
4. Aluminum fluoride (AlF3), formed from Al and F.
5. Oxygen fluoride (OF2), though it is worth noting that the compound is more commonly called oxygen difluoride, formed from F and O.
6. Strontium chloride (SrCl2), formed from Sr and Cl.

To predict the formula of the ionic compound formed between the sodium cation, Na+, and the sulfide anion, S2-, you would need two sodium cations to balance out the charge of one sulfide anion, resulting in Na2S.

Answer 2

Answer and Explanation:

(a) Na and H : The compound formed by Na and H is sodium hydride which formula is NaH

(b) B and O : The compound formed by Ba and O is barium oxide which formula is BaO

(C) Na and S : The compound formed by Na and S is sodium sulfide which formula is
`Na_2S`

(D) Al and F : The compound formed by Al and F is aluminium fluoride which formula is
`AlF_3`

(E) F and O : The compound formed by F and O is oxygen fluoride which formula is
`OF_2`

(F) Sr and Cl : The compound formed by Sr and Cl is strontium chloride which formula is
`Srcl_2`