Question

The compound ncl3 is nitrogen trichloride, but alcl3 is simply aluminum chloride. why

Answer 1

$\text{NCl}_3$ is covalent and therefore named as nitrogen trichloride while $\text{AlCl}_3$ is ionic and therefore named as aluminium chloride.

Further Explanation:

Chemical compound:

These are formed as result of attraction between molecules and atoms known as chemical bond. Chemical bonds can be formed either due to electron transfer or electron sharing.

Covalent compound:

These compounds result by chemical bonds formed by sharing of electrons. Such compounds are also known as molecular compounds.

Ionic compound:

These compounds are formed as result of ionic bond. Ionic bond makes use of electron transference from metallic atom to non-metallic atom. Ions are formed in this bond formation.

In $\text{NCl}_3$ , both constituent atoms are non-metals so covalent bond is formed between these atoms. As a result, $\text{NCl}_3$ is covalent compound and number of atoms is mentioned while writing their names. Therefore $\text{NCl}_3$ is named as nitrogen trichloride.

But in $\text{AlCl}_3$ , aluminum is metal and chlorine is non-metal so ionic bond is formed between these atoms and  $\text{AlCl}_3$ is an ionic compound. While writing names of ionic compounds, number of atoms is not mentioned and therefore   $\text{AlCl}_3$ is named as aluminum chloride.

Learn more:

• Identification of ionic bonding: brainly.com/question/1603987
• What type of bond exists between phosphorus and chlorine? brainly.com/question/81715

Answer details:

Grade: High School

Chapter: Chemical bonding

Subject: Chemistry

Keywords: chemical bond, ionic bond, metallic bond, valence electrons, attraction, cation, anion, metals, atoms, molecules, electrons, positive ions.

Answer 2

The answer to this question would be:
NCl3 is a molecular compound (two or more nonmetals), and therefore in its name prefixes indicate the number of each type of atom. so NCl3 is nitrogen trichloride.
The compound AlCl3 is an ionic compound (metal and nonmetal), and therefore does not require prefixes. so AlCl3 is aluminum chloride.

Both of nitrogen and chlorine is nonmetal, but aluminum is metal. Metal with nonmetal will make an ionic compound that doesn't need prefixes.