Enter the number of electrons in each energy level (shell) for the following ele
ID: 1647662 • Letter: E
Question
Enter the number of electrons in each energy level (shell) for the following elements. If the energy level does not contain any electrons, enter a 0 (zero). It may help to refer to the periodic table.
Map Sapling Learning macmillan learning Enter the number of electrons in each energy level (shell) for the following elements. If the energy level does not contain any electrons, enter a 0 (zero). It may help to refer to the periodic table. n-1 n 2 n 3 n 4 a) He b) Li c) P d) Ca What is the neutral atom that has its first two energy levels filled, has 5 electrons in its third energy level, and has no other electrons? Enter the name of the element, not the abbreviation.Explanation / Answer
a) He has 2 electrons.
He(2) = 1s2
n=1 n=2 n= 3 n= 4
He(2) : 2 0 0 0
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b) Li(3) = 1s2 2s1
n=1 n=2 n= 3 n= 4
Li(3) : 2 1 0 0
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c) P(15) = 1s2 2s2 2p6 3s2 3p3
n=1 n=2 n= 3 n= 4
P(15) : 2 8 5 0
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d) Ca(20) = 1s2 2s2 2p6 3s2 3p6 4s2
n=1 n=2 n= 3 n= 4
Ca(20): 2 8 8 2
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The element is Phosphorous ( from c).It has two energy level filled and third level 5 and fourth level 0.
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