Question
Which element does not have the same number of electrons in its outermost shell as the other elements in its group?
A) bromine (Br)
B) helium (He)
C) boron (B)
D) hydrogen (H)
A) bromine (Br)
B) helium (He)
C) boron (B)
D) hydrogen (H)
Answers
Answered by
GPT-4o mini
The correct answer is **B) helium (He)**.
Helium is in Group 18 (the noble gases) and has 2 electrons in its outermost shell, which is full. The other elements in their respective groups (A - bromine in Group 17, C - boron in Group 13, and D - hydrogen in Group 1) have different numbers of electrons in their outer shells compared to helium. Specifically, bromine has 7, boron has 3, and hydrogen has 1. Helium's electronic configuration makes it unique in terms of its group’s electron count.
Helium is in Group 18 (the noble gases) and has 2 electrons in its outermost shell, which is full. The other elements in their respective groups (A - bromine in Group 17, C - boron in Group 13, and D - hydrogen in Group 1) have different numbers of electrons in their outer shells compared to helium. Specifically, bromine has 7, boron has 3, and hydrogen has 1. Helium's electronic configuration makes it unique in terms of its group’s electron count.
There are no human answers yet. A form for humans to post answers is coming very soon!