There are 2 valence electrons in cerium
Ca 4s23d9
Oxygen
if you like somthin gray let cerium make your day
[Xe] Normally the electronic configuration for Barium would be [Xe] 6s2, but since you want it for Ba2+, you're missing two electrons. You get rid of the 6s2 and get [Xe].
[noble gas]nd1-10ns1-2
[Xe]4f4
Cerium: [Xe].4f1.5d1.6s2 Samarium: [Xe].4f6.6s2 Hassium: [Rn].5f14.6d6.7s2
The electron configuration for cerium is Xe 4f1 5d1 6s2.
The electron configuration of cerium is Xe 4f1 5d1 6s2.
Cerium has an electronic configuration of [Xe] 4f1 5d1 6s2 It is a lanthanide with atomic number 58 Lanthanum atomic number 57 has [Xe] 5d1 6s2 Praseodymium atomic number 59 has [Xe] 4f3 6s2 Cerium is one of the lanthanides that are exceptions to the aufbau principle.
6. Oxygen has an electronic configuration of [He]2s22p4
Ce, cerium. Electronic configuration [Xe]4f15d16s2
They all have 2 electrons in their outer shells.
Periodic Table was constructed by using electronic configuration . Elements have same outer shell electronic configuration were in same group . So they have similar chemical properties . If an unknown element will register in future , its properties are predicted with the help of its outer shell configuration.
The electronic configuration of calcium is 1s2 2s2 2p6 3s2 3p6 4s2. In calcium hydroxide (Ca(OH)2), calcium loses its two outer electrons to form Ca2+ ion, which has the electronic configuration 1s2 2s2 2p6 3s2 3p6.
There would be two electrons. The electronic configuration would be just 1s2 and this is termed the duplet configuration.
ns1, where n is the number of the period in which the element is present