for each row in the table below, decide whether the pair of elements will form a molecular compound, check the box and enter the chemical formula and name of the compound. (if the elements will form more than one molecular compound, use the compound with the fewest total number of atoms.)
you may assume all chemical bonds are single bonds, not double or triple bonds.
| element #1 | element #2 | element pair will form a molecular compound | molecular compound chemical formula | molecular compound name |
| --- | --- | --- | --- | --- |
| hydrogen | chlorine | $square$ | $square$ | $square$ |
| oxygen | hydrogen | $square$ | $square$ | $square$ |
| magnesium | bromine | $square$ | $square$ | $square$ |

Question

Accepted Answer

### First Row (Element #1: Hydrogen, Oxygen, Magnesium; Element #2: Hydrogen, Hydrogen, Bromine? Wait, let's re-express the table properly:

Looking at the table:

| Element #1 | Hydrogen | Oxygen | Magnesium |
|------------|----------|--------|-----------|
| Element #2 | Chlorine | Hydrogen | Bromine |
| Element pair will form a molecular compound? |  |  |  |
| Chemical formula (if molecular) |  |  |  |
| Molecular compound name (if molecular) |  |  |  |

#### Let's analyze each row:

### Row 1: Element #1 = Hydrogen, Element #2 = Chlorine
- **Step 1: Determine bond type**
  Hydrogen (nonmetal) and Chlorine (nonmetal) form a covalent bond (molecular compound).
- **Step 2: Find the simplest formula**
  Hydrogen and Chlorine combine in a 1:1 ratio (both need 1 electron to fill valence shells). So formula is $HCl$.
- **Step 3: Name the compound**
  For binary molecular compounds, use prefixes (but since it’s 1:1, “mono-” is omitted for the first element, “mono-” is also omitted for the second but we use the -ide suffix). So name is *hydrogen chloride* (or *hydrochloric acid* if aqueous, but as a gas, it’s hydrogen chloride).

### Row 2: Element #1 = Oxygen, Element #2 = Hydrogen
- **Step 1: Bond type**
  Oxygen (nonmetal) and Hydrogen (nonmetal) form a covalent bond (molecular compound).
- **Step 2: Simplest formula (fewest atoms)**
  The simplest molecular compound is $H_2O$ (water). Wait, but wait—wait, the problem says “fewest total number of atoms.” Wait, $H_2O$ has 3 atoms, but is there a simpler one? No, because O needs 2 electrons, H needs 1 each—so 2 H and 1 O. Alternatively, $H_2O_2$ (hydrogen peroxide) has 4 atoms, so $H_2O$ is simpler. Wait, but wait: the problem says “fewest total number of atoms.” Wait, maybe $HO$? No, that’s unstable. Wait, no—hydrogen and oxygen form $H_2O$ (stable, 3 atoms) or $H_2O_2$ (4 atoms). So $H_2O$ is simpler. Wait, but maybe the problem allows single bonds? Wait, O has 6 valence electrons, needs 2. H has 1, needs 1. So to satisfy O’s 2 bonds, we need 2 H atoms. So formula is $H_2O$.
- **Step 3: Name**
  *Dihydrogen monoxide* (or *water*).

### Row 3: Element #1 = Magnesium, Element #2 = Bromine
- **Step 1: Bond type**
  Magnesium (metal) and Bromine (nonmetal) form an ionic bond (not molecular). So they do **not** form a molecular compound.

### Filling the table:

| Element #1 | Element #2 | Will form a molecular compound? | Chemical formula | Molecular compound name |
|------------|------------|----------------------------------|------------------|-------------------------|
| Hydrogen   | Chlorine   | $\boldsymbol{\checkmark}$         | $HCl$            | Hydrogen chloride       |
| Oxygen     | Hydrogen   | $\boldsymbol{\checkmark}$         | $H_2O$           | Dihydrogen monoxide (or Water) |
| Magnesium  | Bromine    | $\boldsymbol{	imes}$             | –                | –                       |

### Final Answers (for each row):

1. **Hydrogen + Chlorine**:
   - Molecular? Yes (check the box).
   - Formula: $HCl$
   - Name: Hydrogen chloride

2. **Oxygen + Hydrogen**:
   - Molecular? Yes (check the box).
   - Formula: $H_2O$
   - Name: Dihydrogen monoxide (or Water)

3. **Magnesium + Bromine**:
   - Molecular? No (leave box unchecked).
   - Formula: –
   - Name: –

(Note: The problem’s table has three rows: first row elements: H, O, Mg; second row: Cl, H, Br. So aligning:

- First column (Element #1): H, O, Mg
- Second column (Element #2): Cl, H, Br

So:

- Row 1: H + Cl → molecular, $HCl$, hydrogen chloride
- Row 2: O + H → molecular, $H_2O$, dihydrogen monoxide (or water)
- Row 3: Mg + Br → ionic, not molecular

If you need to check boxes:

- For “will form a molecular compound”:
  - H + Cl: check
  - O + H: check
  - Mg + Br: uncheck

- Chemical formula:
  - H + Cl: $HCl$
  - O + H: $H_2O$
  - Mg + Br: (leave blank)

- Molecular compound name:
  - H + Cl: Hydrogen chloride
  - O + H: Dihydrogen monoxide (or Water)
  - Mg + Br: (leave blank)

### Answer (for each row):

| Element #1 | Element #2 | Molecular Compound? | Formula | Name |
|------------|------------|---------------------|---------|------|
| Hydrogen   | Chlorine   | $\checkmark$        | $HCl$   | Hydrogen chloride |
| Oxygen     | Hydrogen   | $\checkmark$        | $H_2O$  | Dihydrogen monoxide (Water) |
| Magnesium  | Bromine    | $	imes$            | –       | –    |

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

First Row (Element #1: Hydrogen, Oxygen, Magnesium; Element #2: Hydrogen, Hydrogen, Bromine? Wait, let's re-express the table properly:

Let's analyze each row:

Row 1: Element #1 = Hydrogen, Element #2 = Chlorine

Row 2: Element #1 = Oxygen, Element #2 = Hydrogen

Row 3: Element #1 = Magnesium, Element #2 = Bromine

Filling the table:

Final Answers (for each row):

Answer:

element #1	element #2	element pair will form a molecular compound	molecular compound chemical formula	molecular compound name
oxygen	hydrogen	$square$	$square$	$square$
magnesium	bromine	$square$	$square$	$square$

Element #1	Hydrogen	Oxygen	Magnesium
Element pair will form a molecular compound?
Chemical formula (if molecular)
Molecular compound name (if molecular)

Element #1	Element #2	Will form a molecular compound?	Chemical formula	Molecular compound name
Oxygen	Hydrogen	$\boldsymbol{\checkmark}$	$H_2O$	Dihydrogen monoxide (or Water)
Magnesium	Bromine	$\boldsymbol{\times}$	–	–

Element #1	Element #2	Molecular Compound?	Formula	Name
Oxygen	Hydrogen	$\checkmark$	$H_2O$	Dihydrogen monoxide (Water)
Magnesium	Bromine	$\times$	–	–