Question

Identify the number of core and valence electrons for each atom valence electrons 

Хе: core electrons Хе: valence electrons

Ra: core electrons  Ra: valence electrons 

F: core electrons F: valence electrons

Answer 1

Answer:-

1)- Xe has 54 total electrons in which 8 valance and 46 core electrons

2)- Ra is the heaviest of the alkaline earth metals. Radium atoms have 88 electrons and 88 protons with 2 valence electrons in the outer shell and 86 core electrons.

3)- flourine has total 9 electrons in which 7 valance electrons and 2 core electrons.