When determining the formula for a compound, it is important to know the valence numbers of each element. Suppose that "element A" has a valence number of 3 and "element B" has a valence of 2. If the two elements combine, then when writing the formula for the resulting compound what subscript number will be given to "element B".

To find the formula for the resulting compound, you need to balance the charges of the elements. Since element A has a valence of 3 and element B has a valence of 2, you need to find the smallest multiple that both valences can reach - in this case, 6. Element A's subscript will be 2 (3 * 2) and element B's subscript will be 3 (2 * 3). So the subscript number for element B will be 3.

To determine the subscript number for "element B" in the formula for the resulting compound, we need to use the concept of valence numbers and the principle of charge balance.

Given that "element A" has a valence number of 3 and "element B" has a valence of 2, we can conclude that "element A" tends to lose 3 electrons and "element B" tends to gain 2 electrons to achieve a stable electron configuration.

For the two elements to combine, there needs to be an equal exchange of electrons between them. To achieve this, we can use the lowest common multiple (LCM) of their valence numbers, which is 6.

Therefore, the subscript number for "element B" in the formula for the resulting compound will be 3, indicating that three "element B" atoms are needed to balance the charge with one "element A" atom.

The formula for the resulting compound can be written as A3B.

When determining the formula for a compound, you need to consider the valence numbers of each element. The valence number represents the number of bonds an element can form. In this case, "element A" has a valence number of 3, and "element B" has a valence number of 2.

To write the formula for the resulting compound, you need to balance the valences of the combining elements. The compound will have a neutral charge, which means that the sum of the valence numbers should be zero.

Since "element A" has a valence number of 3, it can form up to three bonds. To balance its valence, "element B" needs to contribute a total valence number of 3 as well, since the compound should be neutral.

Since "element B" has a valence number of 2, it can only form two bonds. To achieve a total valence number of 3, you would need two atoms of "element B". Therefore, the subscript number for "element B" would be 2 in the formula.

To write the formula, you can use the chemical symbols for the elements. Let's say "element A" is symbolized by X and "element B" by Y. The formula for the resulting compound would be XY2. This represents one atom of "element A" bonded with two atoms of "element B", which balances the valences and gives the compound a neutral charge.