Question

multiple choice 6 points
an ionic compound formula consists of:
○ a negatively charged non - metal first, then a positively charged metal
○ a positively charged metal first, then a negatively charged non - metal
○ a negatively charged metal first, then a positively charged non - metal
○ a positively charged non - metal first, then a negatively charged metal
○ the order doesnt matter as long as the net charge is zero

multiple choice 6 points
name the following compound: lif
○ lithium fluoride
○ fluorine lithium
○ lithium (i) fluoride
○ lithium fluorine

Explanation:

Ionic compounds are formed from the electrostatic attraction between cations (positively - charged ions) and anions (negatively - charged ions). Metals tend to lose electrons to form cations, and non - metals tend to gain electrons to form anions. In the formula of an ionic compound, the cation (positively charged metal) is written first, followed by the anion (negatively charged non - metal).

For naming ionic compounds like LiF:

• The cation is named first. Here, the cation is \(Li^{+}\) (lithium ion).
• The anion is named second. The anion is \(F^{-}\) (fluoride ion). The suffix “-ide” is added to the root name of the non - metal (fluor - → fluoride) when naming simple binary ionic compounds.

Answer:

For the first question: a positively charged metal first, then a negatively charged non - metal.
For the second question: lithium fluoride.