Question

Which of the following electronic changes will cause a group V-A (15) element to achieve a noble gas configuration? 1: Gaining three electrons 2: Losing three electrons 3: Gaining two electrons 4: Losing two electrons

Answer 1

Group V-A (15) elements need to gain three electrons in order to achieve a noble gas configuration.

Step-by-step explanation:

Elements in group V-A (15) need to gain three electrons in order to achieve a noble gas configuration. The noble gases have a completely filled outer electron shell, and by gaining three electrons, a group V-A element can fill its outer shell and achieve stability. Losing electrons or gaining two electrons will not result in a noble gas configuration for group V-A elements.

Answer 2

Group V-A (15) elements achieve a noble gas configuration by gaining three electrons to complete their valence shell octet. So the correct option is 1.

Step-by-step explanation:

The electronic change that will cause a group V-A (15) element to achieve a noble gas configuration is gaining three electrons. Group V-A elements have five valence electrons and need three more to complete their octet, which gives them the stability of a noble gas electron configuration. From our understanding of periodic trends and the octet rule, nonmetals on the right side of the periodic table, like those in groups 15-17, gain electrons to achieve the valence electron configuration of the nearest noble gas.