for each row in the table below, decide whether the pair of elements will form a molecular compound, check…

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.)\nyou may assume all chemical bonds are single bonds, not double or triple bonds.\n| element #1 | element #2 | element pair will form a molecular compound | molecular compound chemical formula | molecular compound name |\n| --- | --- | --- | --- | --- |\n| hydrogen | chlorine | $square$ | $square$ | $square$ |\n| oxygen | hydrogen | $square$ | $square$ | $square$ |\n| magnesium | bromine | $square$ | $square$ | $square$ |

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.)\nyou may assume all chemical bonds are single bonds, not double or triple bonds.\n| element #1 | element #2 | element pair will form a molecular compound | molecular compound chemical formula | molecular compound name |\n| --- | --- | --- | --- | --- |\n| hydrogen | chlorine | $square$ | $square$ | $square$ |\n| oxygen | hydrogen | $square$ | $square$ | $square$ |\n| magnesium | bromine | $square$ | $square$ | $square$ |

Answer

Explanation:

Step 1: Analyze the first row (Element #1: Hydrogen, Oxygen, Magnesium; Element #2: Chlorine, Hydrogen, Bromine? Wait, no, let's re - examine the table. Wait, the first row: Element #1 has Hydrogen, Oxygen, Magnesium? Wait, no, the table columns: first column is "element #1" with rows Hydrogen, Chlorine? Wait, maybe I misread. Let's start over.

Looking at the table:

Row 1 (let's call it Row 1):

  • Element #1: Hydrogen, Oxygen, Magnesium (wait, no, the first column under "element #1" has Hydrogen, Chlorine? No, the table structure:

Columns:

  • Element #1: has three cells? Wait, the first column (element #1) has Hydrogen, Chlorine? No, the user's table:

First row (top row) of the table:

  • element #1: hydrogen, oxygen, magnesium (maybe three elements? No, maybe each row is a pair. Wait, the problem says "for each row in the table below, decide whether the pair of elements will form a molecular compound...". So each row is a pair of elements. Let's list the rows:

Row 1: Element #1: Hydrogen, Oxygen, Magnesium? No, maybe the first row's elements are (Hydrogen, Chlorine? No, the first row under "element #1" is Hydrogen, Oxygen, Magnesium? Wait, the table has:

First column (element #1) has:

  • hydrogen
  • chlorine
  • (empty)

Second column (element #2) has:

  • oxygen
  • hydrogen
  • (empty)

Third column (element #3? No, the problem says "pair of elements". Wait, maybe the table is:

Row 1: Element 1: Hydrogen, Element 2: Oxygen; and another element? No, the problem says "pair of elements". Maybe the table is:

Row 1: Element #1: Hydrogen, Element #2: Oxygen (and Magnesium? No, maybe a typo. Wait, the user's table:

Looking at the text:

"element #1" column: hydrogen, chlorine, (empty)

"element #2" column: oxygen, hydrogen, (empty)

"element #3" column: magnesium, bromine, (empty)

Wait, no, the problem says "pair of elements", so maybe each row is a pair. Let's take Row 1: Element 1: Hydrogen, Element 2: Oxygen. Will they form a molecular compound? Hydrogen and Oxygen: they form H₂O, which is a molecular compound (covalent bonds? Wait, H₂O has polar covalent bonds, so it is a molecular compound.

Row 2: Element 1: Chlorine, Element 2: Hydrogen. Chlorine and Hydrogen form HCl, which is a molecular compound (covalent bond between H and Cl).

Row 3: Element 1: Magnesium, Element 2: Bromine. Magnesium is a metal, Bromine is a non - metal. They will form an ionic compound (MgBr₂), not a molecular compound (molecular compounds are formed by covalent bonds between non - metals, mostly).

Now, for the first row (Hydrogen and Oxygen):

Step 2: Determine the formula for H and O (molecular compound, fewest atoms). The simplest molecular compound is H₂O (2 H and 1 O, total 3 atoms) or H₂O₂ (but H₂O has fewer atoms). Wait, the problem says "the compound with the fewest total number of atoms". So for H and O, the formula is H₂O. Name: water (or dihydrogen monoxide).

For the second row (Cl and H): the molecular compound is HCl (1 H and 1 Cl, total 2 atoms, which is the fewest). Name: hydrogen chloride (or hydrochloric acid, but as a molecular compound, hydrogen chloride).

For the third row (Mg and Br): they form an ionic compound (MgBr₂), so they do not form a molecular compound (so we don't check the box).

Now, let's go back to the first row (Hydrogen and Oxygen):

  • Will they form a molecular compound? Yes (covalent bonds). So check the box for "element pair will form a molecular compound".

  • Chemical formula: H₂O (fewest atoms: 2 H + 1 O = 3 atoms; H₂O₂ has 4 atoms, so H₂O is better).

  • Name: water (or dihydrogen oxide, but commonly water or dihydrogen monoxide).

Second row (Chlorine and Hydrogen):

  • Will they form a molecular compound? Yes (covalent bond between H and Cl). Check the box.

  • Chemical formula: HCl (1 H + 1 Cl = 2 atoms, fewest).

  • Name: hydrogen chloride.

Third row (Magnesium and Bromine):

  • Will they form a molecular compound? No (ionic bond), so do not check the box.

But let's focus on the first row (Hydrogen and Oxygen) as an example.

Step 1: Check if the pair (H and O) forms a molecular compound. H and O are non - metals (O is non - metal, H is non - metal - like in covalent bonding), so they form a covalent (molecular) compound.

Step 2: Determine the formula with fewest atoms. The valence of H is 1, O is 2. To satisfy octet, O needs 2 H atoms. So formula is H₂O (2 H, 1 O; total 3 atoms).

Step 3: Name the compound. H₂O is named water (or dihydrogen monoxide).

Answer:

For the row with Hydrogen (element #1) and Oxygen (element #2):

  • "element pair will form a molecular compound": Checked.

  • Chemical formula: $\ce{H_2O}$

  • Molecular compound name: Water (or Dihydrogen Monoxide)

For the row with Chlorine (element #1) and Hydrogen (element #2):

  • "element pair will form a molecular compound": Checked.

  • Chemical formula: $\ce{HCl}$

  • Molecular compound name: Hydrogen Chloride

For the row with Magnesium (element #1) and Bromine (element #2):

  • "element pair will form a molecular compound": Unchecked.