Which atom is the product (parent isotope) of beta decay of xenon-140? 140
Xe = ?+7e
54
A. 140
I
53
OB. 141
Cs
55
O C. 140
Cs
55
OD. 139
Xe
54

How much energy moves onto the next level, in an energy pyramid

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Element before carbon on the periodic table