Asked by Roger
What is the electron configuration for Be 2+ ions?
1) 1 3) 2-1
2)2 4) 2-2
I also need an explanation for the correct and incorrect answers because I am confused by this problem.
1) 1 3) 2-1
2)2 4) 2-2
I also need an explanation for the correct and incorrect answers because I am confused by this problem.
Answers
Answered by
DrBob222
Fill the 1s first. It can hold 2 electrons.
Fill the 2s next. It can hold 2 electrons.
Fill the 2p next (if needed). It can hold 6 electrons.
How many electrons do we need to fit into Be (the neutral atom). The atomic number is 4; therefore, Be atom is
<sub>4</sub>Be = 1s2 2s2
For the +2 ion, we remove the last two electrons. So the new configuration for the +2 ion is
1s2.
Fill the 2s next. It can hold 2 electrons.
Fill the 2p next (if needed). It can hold 6 electrons.
How many electrons do we need to fit into Be (the neutral atom). The atomic number is 4; therefore, Be atom is
<sub>4</sub>Be = 1s2 2s2
For the +2 ion, we remove the last two electrons. So the new configuration for the +2 ion is
1s2.
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