Question

1. mg^{+2} & s^{-2}

name:________________________

1. mg^{+2} & n^{-3}

name:________________________

1. na^{+} & p^{-3}

name:________________________
naming ionic compounds

1. what are the prefixes for naming covalent compounds?
2. how do you determine which type of chemical bond atoms of a compound have?

mixed naming compounds
directions: classify each compound as ionic or covalent, and then write the compound name.

1. mgo □ ionic □ covalent

________________________

1. sf_{6} □ ionic □ covalent

________________________

1. na_{2}o □ ionic □ covalent

________________________

1. cacl_{2} □ ionic □ covalent

________________________

1. no □ ionic □ covalent

________________________

1. p_{4}o_{10} □ ionic □ covalent

________________________

1. as_{2}o_{5} □ ionic □ covalent

________________________
writing chemical formulas
directions: write the chemical formula based on the compound name given.

1. copper sulfide ________________
2. xenon hexafluoride ________________
3. phosphorus pentoxide ________________
4. dinitrogen tetroxide ________________
5. sulfur difluoride ________________
6. dinitrogen pentoxide ________________
7. selenium hexachloride ________________
8. dicarbon tetrahydride ________________

Explanation:

Question 25: $Mg^{+2}$ & $S^{-2}$

Step1: Determine the formula

To form a neutral compound, the charges must balance. The charge of $Mg$ is $+2$ and $S$ is $-2$. The ratio of $Mg$ to $S$ is $1:1$ (since $2$ and $2$ cancel out). So the formula is $MgS$.

Step2: Name the ionic compound

For ionic compounds, we use the name of the cation (magnesium) and the anion (sulfide, since sulfur gains 2 electrons, so the suffix is -ide).

Step1: Determine the formula

The charge of $Mg$ is $+2$ and $N$ is $-3$. To balance charges, we find the least common multiple of 2 and 3, which is 6. So we need 3 $Mg$ ions ($3 \times +2 = +6$) and 2 $N$ ions ($2 \times -3 = -6$). The formula is $Mg_3N_2$.

Step2: Name the ionic compound

Cation: magnesium, anion: nitride (nitrogen gains 3 electrons, suffix -ide).

Step1: Determine the formula

Charge of $Na$ is $+1$, charge of $P$ is $-3$. To balance, we need 3 $Na$ ions ($3 \times +1 = +3$) and 1 $P$ ion ($1 \times -3 = -3$). Formula: $Na_3P$.

Step2: Name the ionic compound

Cation: sodium, anion: phosphide (phosphorus gains 3 electrons, suffix -ide).

Answer:

Magnesium sulfide

Question 26: $Mg^{+2}$ & $N^{-3}$