7.
There are 7 electrons in the third shell of an element
a. Write its subshell electronic configuration,
b. Find the group and block of this element
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Answer:
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Answer:
a. 1s 22s 22p 63s 23p5
b. halogens
Explanation:
A neutral chlorine atom has 17 electrons. Two electrons can go into the 1s subshell, 2 can go into the 2s subshell, and 6 can go into the 2p subshell. That leaves 7 electrons. ... Thus, the electron configuration of neutral chlorine atoms is 1s 22s 22p 63s 23p5
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