Question

Based on the periodic table, elements from group 1 and 13 will combine in which ratio? (group 1 to 13)

a. 1:3
b. 1:1
c. 3:1
d. these elements will not combine.

Answer 1

Elements from group 1 and group 13 will combine in a 3:1 ratio to balance their charges when forming ionic compounds.

Step-by-step explanation:

Based on the periodic table, elements from group 1 and group 13 will combine in a 3:1 ratio. This is because elements in group 1 are known as the alkali metals and have a +1 charge due to the loss of one electron to achieve a stable electron configuration.

In contrast, elements in group 13 lose three electrons to form a +3 charge cation. Therefore, to balance the charges when these groups react to form ionic compounds, three group 1 atoms (each providing one electron) are needed for every one group 13 atom (which needs three electrons). Hence, the correct answer to the given question is choice c. 3:1.