which formula below would be the correct match between nickel (ii) (ni) and bromine (br)? hint: nickel has 2 valence electrons because of the roman numeral next to its symbol. any time you see a roman numeral you need to remember that is the number of valence electrons.

nibr2

nibr

ni2br

ni2br3

Will mark as brainliest. i need .select the correct boxes. 1. similarity between united states and roman republic. 2. difference between united states and roman republic1. the government had a written constitution. 2. women could vote. 3. there was a system of checks and balances. 4. the government could use a veto to cancel an action.