What is the ralio of sr + ions to brions in a neutral compound?
o 1: 1
o 1: 2
o 2: 1
o 3: 2

1:2

Explanation:

In neutral compound the negative and positive charges are always equal. Thus cancel the effect of each other and make the compound over all neutral.

The compound made by strontium and bromine is given below.

SrBr₂

It is known that  halogens atom gain one electron to complete the outer most valance shell and usually show -1 oxidation state.

(x) + 2(-1) = 0

x + (-2) = 0

x -2 = 0

x = +2

The oxidation sate of strontium is +2 and bromine is -2 thus make the compound overall neutral.

Sr⁺²  Br⁻¹

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6