Unit 6 Worksheet 3 Ionic Compounds | airSlate SignNow - Free Printable

Let’s go step by step to solve this worksheet.

We are given names of ionic compounds and need to write their chemical formulas — or vice versa. The key is to remember that ionic compounds are made of positive ions (cations) and negative ions (anions), and the total charge must be zero.

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Part 1: Given the name, write the formula

#### a. Na₃O → sodium oxide
Sodium is Na⁺, oxygen is O²⁻. To balance charges: 2×Na⁺ = +2, but we need +2 to cancel -2? Wait — actually, 3 Na⁺ = +3, O²⁻ = -2 → not balanced! That can’t be right.

Wait — let’s double-check: Sodium oxide should be Na₂O, because 2×(+1) + (-2) = 0. But here it says “Na₃O” — that’s incorrect for sodium oxide. Maybe it’s a trick? Or maybe it’s sodium *peroxide*? No — peroxide is Na₂O₂.

Actually, looking again — the problem says “Given the name... simple binary ionic compounds.” So if they wrote “Na₃O”, that might be a mistake — but perhaps it’s meant to be “sodium oxide” which is Na₂O. But wait — the student is supposed to fill in the blank next to the name. Let me read carefully.

Looking at the image description:

> 1. Give the name of the following simple binary ionic compounds.
> a. Na₃O _________

So actually, part 1 is: given the formula, give the NAME.

I misread earlier. Let me correct.

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## Correction: Part 1 is “Give the NAME” for given formulas.

Part 2 is “Write the FORMULA” for given names.

Let’s do them one by one.

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## PART 1: Give the name for these formulas

a. Na₃O

Sodium ion is always Na⁺. Oxygen forms O²⁻.
To balance: 3×(+1) = +3, so anion must be -3? But oxygen is usually -2. This doesn’t make sense.
Wait — maybe it’s a typo? In reality, sodium oxide is Na₂O. Na₃O does not exist as a stable compound. But since this is a worksheet, perhaps they mean “sodium oxide” even though the formula is wrong? Or maybe it’s “trisodium monoxide”? But that’s not standard.

Hold on — let’s check common compounds. Actually, there is no such thing as Na₃O. The correct formula for sodium oxide is Na₂O. Perhaps this is a test to see if students notice? But unlikely for basic level.

Alternatively — maybe it’s Na₂O and it’s misprinted? But in the user’s text it says “Na₃O”.

Wait — looking back at the original request: the user pasted text from the image. Let me re-read:

“a. Na₃O _________”

But in standard chemistry, Na₃O is not correct. However, sometimes worksheets have errors. But let’s assume it’s intentional and think: what cation has +1 charge and combines with O²⁻ to give Na₃O? It would require the anion to be O³⁻, which doesn’t exist.

This is confusing. Perhaps it’s a mistake and should be Na₂O → sodium oxide.

But let’s look at other parts to see pattern.

b. K₂S → potassium sulfide → correct: K⁺ and S²⁻ → 2K⁺ + S²⁻ = neutral → name is potassium sulfide.

c. MgCl₂ → magnesium chloride → Mg²⁺ and Cl⁻ → correct.

d. CaBr₂ → calcium bromide → Ca²⁺ and Br⁻ → correct.

e. BaI₂ → barium iodide → Ba²⁺ and I⁻ → correct.

f. AgBr → silver bromide → Ag⁺ and Br⁻ → correct.

g. CdTe → cadmium telluride → Cd²⁺ and Te²⁻ → correct.

h. AlF₃ → aluminum fluoride → Al³⁺ and F⁻ → correct.

i. Li₃N → lithium nitride → Li⁺ and N³⁻ → 3Li⁺ + N³⁻ = neutral → correct.

j. ZnO → zinc oxide → Zn²⁺ and O²⁻ → correct.

k. SrH₂ → strontium hydride → Sr²⁺ and H⁻ → correct.

l. BeSe → beryllium selenide → Be²⁺ and Se²⁻ → correct.

m. Rb₂O → rubidium oxide → Rb⁺ and O²⁻ → 2Rb⁺ + O²⁻ = neutral → correct.

n. Cs₂S → cesium sulfide → Cs⁺ and S²⁻ → correct.

o. ScN → scandium nitride → Sc³⁺ and N³⁻ → correct.

p. Y₂O₃ → yttrium oxide → Y³⁺ and O²⁻ → 2Y³⁺ = +6, 3O²⁻ = -6 → correct.

q. LaCl₃ → lanthanum chloride → La³⁺ and Cl⁻ → correct.

r. TiO₂ → titanium(IV) oxide — but wait, the worksheet says "simple binary ionic compounds" and may not use Roman numerals yet. Titanium can have multiple charges, but in many intro courses, they might just say "titanium oxide" assuming +4. But strictly, it should be titanium(IV) oxide. However, looking at the list, all others are fixed-charge metals except possibly transition metals.

In the given list for part 1, most are main group elements with fixed charges. Ti is transition metal — but in this context, since it's listed without specification, and the answer expected is probably "titanium oxide", but technically it's ambiguous.

But let’s stick to standard naming.

Back to a. Na₃O — this must be an error. Because sodium only forms +1, oxygen -2, so formula must be Na₂O. I suspect it’s a typo and should be Na₂O → sodium oxide.

Perhaps in some contexts, but I think for accuracy, I’ll note that.

But since this is a student worksheet, and likely expects "sodium oxide" even if formula is wrong, or perhaps it’s Na₂O miswritten.

Another possibility: maybe it’s “sodium superoxide” which is NaO₂, but that’s not Na₃O.

I think safest is to assume it’s a typo and should be Na₂O → sodium oxide.

But let’s proceed with what’s written.

Perhaps the student is to recognize that Na₃O is invalid, but that seems advanced.

Looking at part 2, they have things like “lithium bromide” etc., so part 1 is straightforward naming.

I will go with:

a. Na₃O — this is likely a mistake; correct formula for sodium oxide is Na₂O, so name is sodium oxide. But since it’s written as Na₃O, perhaps it’s “trisodium oxide” but that’s not standard. I think for educational purpose, we'll say "sodium oxide" assuming typo.

To be precise, let's calculate the charge: if Na is +1 each, three Na = +3, so O must be -3, which is not possible. So probably error.

But in many textbooks, they might have Na₂O. I recall that in some old systems, but no.

Perhaps it’s Na2O and the '2' looks like '3'? Unlikely.

Another thought: in the user's text, it's "Na₃O" but in image it might be different. Since I don't have image, I have to go by text.

Let me check online or standard knowledge: sodium oxide is Na2O. There is no Na3O.

For the sake of completing the worksheet, I'll put "sodium oxide" and assume it's a typo.

Similarly, for others.

Let’s list all for part 1:

a. Na₃O — sodium oxide (assuming typo, should be Na₂O)

b. K₂S — potassium sulfide

c. MgCl₂ — magnesium chloride

d. CaBr₂ — calcium bromide

e. BaI₂ — barium iodide

f. AgBr — silver bromide

g. CdTe — cadmium telluride

h. AlF₃ — aluminum fluoride

i. Li₃N — lithium nitride

j. ZnO — zinc oxide

k. SrH₂ — strontium hydride

l. BeSe — beryllium selenide

m. Rb₂O — rubidium oxide

n. Cs₂S — cesium sulfide

o. ScN — scandium nitride

p. Y₂O₃ — yttrium oxide (or yttrium(III) oxide, but simple name is fine)

q. LaCl₃ — lanthanum chloride

r. TiO₂ — titanium oxide (though technically titanium(IV) oxide, but for simple binary, often just "titanium oxide")

Now part 2: given name, write formula.

a. lithium bromide — Li⁺ and Br⁻ → LiBr

b. sodium oxide — Na⁺ and O²⁻ → Na₂O

c. silver sulfide — Ag⁺ and S²⁻ → Ag₂S

d. cesium oxide — Cs⁺ and O²⁻ → Cs₂O

e. beryllium iodide — Be²⁺ and I⁻ → BeI₂

f. barium hydride — Ba²⁺ and H⁻ → BaH₂

g. aluminum fluoride — Al³⁺ and F⁻ → AlF₃

h. potassium oxide — K⁺ and O²⁻ → K₂O

i. Wro te the formula for these ionic compounds for these ionic compounds — wait, it says "Wrote the formula for these ionic compounds for these ionic compounds" — probably typo, should be "Write the formula for these ionic compounds"

Then:

a. silver oxide — Ag⁺ and O²⁻ → Ag₂O

b. aluminum sulfide — Al³⁺ and S²⁻ → Al₂S₃

c. calcium nitride — Ca²⁺ and N³⁻ → Ca₃N₂

d. barium chloride — Ba²⁺ and Cl⁻ → BaCl₂

e. strontium hydride — Sr²⁺ and H⁻ → SrH₂

Now, let's compile answers.

First, for part 1, I need to provide names.

But for a. Na₃O, I think it's best to state that it's likely a typo and should be Na₂O, name is sodium oxide. But since the worksheet has it, perhaps in some curricula they accept it, but I doubt it.

Upon second thought, there is a compound called trisodium phosphate, but that's not binary. For binary, no.

I found that in some contexts, but I think for this level, it's an error.

Perhaps the student is to write "invalid" but that's not typical.

Another idea: maybe it's Na2O and the subscript is 2, but written as 3 by mistake in text extraction.

I think I'll go with "sodium oxide" for a.

Similarly, for r. TiO2, "titanium oxide" is acceptable for introductory level.

So let's list:

Part 1:

a. sodium oxide

b. potassium sulfide

c. magnesium chloride

d. calcium bromide

e. barium iodide

f. silver bromide

g. cadmium telluride

h. aluminum fluoride

i. lithium nitride

j. zinc oxide

k. strontium hydride

l. beryllium selenide

m. rubidium oxide

n. cesium sulfide

o. scandium nitride

p. yttrium oxide

q. lanthanum chloride

r. titanium oxide

Part 2:

a. LiBr

b. Na2O

c. Ag2S

d. Cs2O

e. BeI2

f. BaH2

g. AlF3

h. K2O

i. (the "Wrote" part) — a. Ag2O, b. Al2S3, c. Ca3N2, d. BaCl2, e. SrH2

In the user's text, for part 2, it starts with "a. lithium bromide" etc., then after h, it says "i. Wrote the formula..." which is probably a heading for another set, but in the text it's listed as i,j,k,l,m for the second set.

In the initial paste:

"2. Write the formula for the following binary ionic compounds.

a. lithium bromide

b. sodium oxide

c. silver sulfide

d. cesium oxide

e. beryllium iodide

f. barium hydride

g. aluminum fluoride

h. potassium oxide

i. Wrote the formula for these ionic compounds for these ionic compounds

a. silver oxide

b. aluminum sulfide

c. calcium nitride

d. barium chloride

e. strontium hydride"

This is messy. Probably "i." is a typo, and it's meant to be a separate section or continuation. Likely, the "i. Wrote..." is a mistake, and the next a-e are additional items for part 2.

So part 2 has 13 items: a to h, then a to e again, but labeled differently.

In standard interpretation, after h, it should be i,j,k,l,m for the next five.

In the text, it says "i. Wrote the formula..." which is redundant, then lists a to e. I think it's a formatting error, and the intended part 2 is:

a. lithium bromide → LiBr

b. sodium oxide → Na2O

c. silver sulfide → Ag2S

d. cesium oxide → Cs2O

e. beryllium iodide → BeI2

f. barium hydride → BaH2

g. aluminum fluoride → AlF3

h. potassium oxide → K2O

i. silver oxide → Ag2O

j. aluminum sulfide → Al2S3

k. calcium nitride → Ca3N2

l. barium chloride → BaCl2

m. strontium hydride → SrH2

Yes, that makes sense.

So now, to present the answers clearly.

Final Answer:

Part 1: Names for given formulas

a. sodium oxide
b. potassium sulfide
c. magnesium chloride
d. calcium bromide
e. barium iodide
f. silver bromide
g. cadmium telluride
h. aluminum fluoride
i. lithium nitride
j. zinc oxide
k. strontium hydride
l. beryllium selenide
m. rubidium oxide
n. cesium sulfide
o. scandium nitride
p. yttrium oxide
q. lanthanum chloride
r. titanium oxide

Part 2: Formulas for given names

a. LiBr
b. Na₂O
c. Ag₂S
d. Cs₂O
e. BeI₂
f. BaH₂
g. AlF₃
h. K₂O
i. Ag₂O
j. Al₂S₃
k. Ca₃N₂
l. BaCl₂
m. SrH₂

Note: For part 1a, Na₃O is likely a typo and should be Na₂O for sodium oxide. If strictly following the formula, it's not a valid compound, but for educational purposes, we've used the standard name.

Also, for TiO₂, "titanium oxide" is commonly used in introductory courses, though more precisely it's titanium(IV) oxide.

All other answers follow standard ionic compound naming rules.