Method used to write the formula for an ionic compound?

Answer 1

1. Write the symbols (cation then anion)
2. Write the combining capacity for each element over the symbol
3. Use the 'cross over' method and reduce the numbers to the lowest ratio

Answer 2

First write the formula as you would for an atom or molecule, with the numbers of each type of atom in subscript, then put the charge in superscript at the end of the formula.

Examples: SO42-, Cl-, Mg2+, NH4+

Answer 3

Do you mean the compound formed from ions? If so, here it is: Find the Highest Common Multiple of the charges of the two ions. and then work out how many of each ion is needed (to make a neutral compoud the postitive and the negative hcarges must balance) To find the charges of an atom: Metal: Positive by the group number eg. Aluminium - group 3 = Al 3+ Non Metal: Negative by 8 - group number eg Oxygen - group 6 = O 2- To find the formula of Aluminium Oxide The LCM is 6 - 2 and 3 Therefore, 2 atoms of Aluminium are needed to make 6 and 3 atoms of Oxygen are needed to make 6. Therefore he formula will be Al2O3 (numbers in subscribt)

Answer 4

since ionic compounds don't share the atoms must satifly the situation for the compound to work

Answer 5

im not trying to answer this question, i just want to say this is really hard for me and i need help. please heelp!.

Answer 6

the crisscross method