Question

the compound mgcl₂ is named
magnesium dichloride.
magnesium chloride.
magnesium chlorine.
dimagnesium chloride.
magnesium (ii) chloride.
question 2 (1 point) ✓ saved
which of the following represents the correct electron - dot structure for cl?
cl.
:cl:
:cl:
·cl:
·cl:
question 3 (1 point) ✓ saved
the correct name of the compound ncl₃ is
nitrogen chloride.
nitrogen(iii) chloride.
trinitrogen chloride

Explanation:

For the first question, \(MgCl_2\) is an ionic compound. Magnesium (\(Mg\)) is a metal with a fixed charge (\(+2\)). Chloride (\(Cl^-\)) is the non - metal ion. In naming ionic compounds with fixed - charge metals, we simply name the metal followed by the non - metal ion (ending in - ide). So it's magnesium chloride. "Magnesium dichloride" is incorrect for ionic compounds (prefixes like di - are used in covalent compounds). "Magnesium chlorine" is wrong as the non - metal should be in the ion form (chloride). "Dimagnesium chloride" is incorrect (incorrect metal naming with prefix) and "magnesium (II) chloride" is not needed as \(Mg\) has a fixed \(+ 2\) charge.

For the second question (assuming the correct electron - dot structure is the one with 7 valence electrons shown as dots around \(Cl\)). Chlorine (\(Cl\)) has 7 valence electrons. The electron - dot structure should show these 7 electrons.

For the third question, \(NCl_3\) is a covalent compound. In covalent compound naming, we use prefixes. Nitrogen (\(N\)) is the first element (no prefix as there's one \(N\) atom, but sometimes omitted when it's one). Chlorine (\(Cl\)) has 3 atoms, so we use the prefix tri -. So it's nitrogen trichloride (but if the options are limited, the naming rules for covalent compounds apply where we name the first element, then the second element with a prefix for the number of atoms and - ide ending).

Answer:

1. magnesium chloride
2. (Assuming the correct electron - dot structure with 7 dots around \(Cl\) as per the filled - in option in the image)
3. (Assuming the full option set, but based on covalent compound naming rules)