Question

which of the following groups will pair with a group 3 element, such as aluminum (al), in a 1:1 ratio, based on trends in valence electrons? group 5 group 7 group 4 group 1

Explanation:

Step1: Determine valence electrons of group 3 elements

Group 3 elements have 3 valence electrons. They tend to lose 3 electrons to achieve a stable - electron configuration.

Step2: Analyze valence electrons of each group

Group 5 elements have 5 valence electrons and tend to gain 3 electrons to achieve a stable - electron configuration. A group 3 element and a group 5 element can combine in a 1:1 ratio. For example, aluminum (Al) and nitrogen (N) can form AlN.
Group 7 elements have 7 valence electrons and tend to gain 1 electron.
Group 4 elements have 4 valence electrons and usually form covalent bonds by sharing electrons.
Group 1 elements have 1 valence electron and tend to lose 1 electron.

Answer:

group 5