What is the electron configuration for sulfur? A. 1s2 2s2 2p6 3s2 3p4
B. 1s2 1p6 2s2 2p6 3s2
C. 1s2 2s2 2p6 3s2 3p3 4s1
D. 1s2 2s2 2p6 3p1 3d5t

Explanation:

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so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer