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1998 WAEC Chemistry Theory  Copy and complete the following table Element Number of Neutrons Electronic Configuration Group in the...

Chemistry
WAEC 1998

 Copy and complete the following table

Element Number of Neutrons Electronic Configuration Group in the periodic Table
\(^{23}_{11}Na\)            --- 1s\(^{2}\)2s\(^{2}\)2p\(^{6}\)3s\(^{1}\) 1
\(^4_2He\) 2           ----            ---
              ---- 7 1s\(^{2}\)2s\(^{2}\)2p\(^{2}\)

            ----

 

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Explanation
Element Number of Neutrons Electronic Configuration Group in the periodic Table
\(^{23}_{11}Na\) 12 1s\(^{2}\)2s\(^{2}\)2p\(^{6}\)3s\(^{1}\) 1
\(^4_2He\) 2 1s\(^{2}\) O or VIII or 8
\(^{13}_6C\) 7 1s\(^{2}\)2s\(^{2}\)2p\(^{2}\) IV or 4

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WAEC offline past questions - with all answers and explanations in one app - Download for free
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free