Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d4?
a. titanium (ti)
b. chromium (cr)
c. sulfer (s)
d. selenium (se)
Answer: B
Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d4?
a. titanium (ti)
b. chromium (cr)
c. sulfer (s)
d. selenium (se)
Answer: B