Question

for each row in the table below, decide whether the pair of elements will form a molecular or ionic compound. if they will, then enter the chemical formula of the compound. if the elements will form more than one compound, enter the compound with the fewest total number of atoms. you may assume all chemical bonds are single bonds, not double or triple bonds. element #1 element #2 compound formed? chemical formula oxygen strontium ionic molecular neither sodium bromine ionic molecular neither xenon helium ionic molecular neither

Explanation:

Step1: Determine compound type for oxygen - strontium

Oxygen is a non - metal and strontium is a metal. They form an ionic compound. Strontium has a +2 charge ($Sr^{2+}$) and oxygen has a - 2 charge ($O^{2-}$).

Step2: Write chemical formula for oxygen - strontium

Using the criss - cross method, the chemical formula is $SrO$.

Step3: Determine compound type for sodium - bromine

Sodium is a metal and bromine is a non - metal. They form an ionic compound. Sodium has a +1 charge ($Na^{+}$) and bromine has a - 1 charge ($Br^{-}$).

Step4: Write chemical formula for sodium - bromine

The chemical formula is $NaBr$.

Step5: Determine compound type for xenon - helium

Xenon and helium are both noble gases. They are chemically inert and do not react to form a compound.

Answer:

element #1	element #2	compound formed?	chemical formula
sodium	bromine	ionic	$NaBr$
xenon	helium	neither