"There are two ions per formula unit in this compound. The -1 anion has 8 more electrons than the cation."

I need to find the Chemical formula/name.
Any suggestions on how to start?
This can have more than one correct answer.

I would think MX would represent the compound. That is two ions per formula unit. If X is -1, then M must be +1. That would suggest M would be a group I metal and X would be a group 17 ( or group VIIA sepending upon the system you are using) element. So just pick Na^+ would have 10 electrons (11 -1 = 10) and Cl^- would have 18 (17 + 1 = 18) and that is 8 more electrons for X then for M. I would think, without trying it, that Li and F would work, also.

NaCl

To find the chemical formula and name of the compound, let's break down the given information step-by-step:

Step 1: Determine the charge of the cation and anion.
In this case, the anion has a charge of -1.

Step 2: Calculate the number of electrons gained or lost by the cation and anion.
The anion has 8 more electrons than the cation.

Step 3: Determine the charge of the cation.
Since the anion has a charge of -1, and the cation has fewer electrons, it suggests that the cation's charge is +1.

Step 4: Identify the element corresponding to the cation's charge of +1.
Some common elements with a +1 charge include hydrogen (H+), sodium (Na+), and potassium (K+). However, there may be other possibilities depending on the specific situation.

Step 5: Combine the cation and anion to form the chemical formula.
Since there are two ions per formula unit, you will need two of each ion to balance the charges. For example, if the cation is hydrogen (H+) and the anion is chloride (Cl-), the chemical formula would be H2Cl2 or HCl.

Step 6: Determine the name of the compound.
The name of the compound can be derived from the chemical formula. For example, H2Cl2 would be named "dihydrogen dichloride" or "hydrogen chloride".

Remember, there might be multiple correct answers based on the given information, so consider different combinations of cations and anions to find another possible correct answer.

To find the chemical formula and name for a compound, you need to determine the identities of the cation and anion involved. In this case, we know that there are two ions per formula unit and that the anion has 8 more electrons than the cation.

To start, you can assign variables to represent the unknown elements. Let's use X for the cation and Y for the anion. Since the anion has 8 more electrons than the cation and assuming both ions are complete, we can conclude that the cation has 8 fewer electrons than the anion.

Now, let's determine the charges of these ions. Since the compound is electrically neutral (no overall charge), the charge of the cation must cancel out the charge of the anion. Knowing that the number of electrons equals the number of protons, the charge on an ion is determined by the number of protons:

Charge of cation (X): +q
Charge of anion (Y): -q

Since the compound has two ions per formula unit, the formula can be written as XY2.

Now, we need to find elements that satisfy these conditions. There can be multiple correct answers since there are various elements that can have different charges. For example, a possible answer could be Ca (2+) as the cation and O (2-) as the anion, resulting in the compound CaO (calcium oxide). Another possibility could be Mg (2+) as the cation and F (1-) as the anion, leading to the compound MgF2 (magnesium fluoride).

Therefore, the chemical formula and name of the compound could be CaO (calcium oxide) or MgF2 (magnesium fluoride), among others, depending on the specific elements chosen for the cation and anion.