بلييييييييييييز احد يجاوبني ويساعدني :( في الكيمياء
how many electrons are in (L= 1) in telluiunm atom (52 Te ) ??
1- 20
2- 21
3- 22
4- 23
which of these isoelectronic ions has the smallest radiuS ??
A- F-
B- O2-
C- Na+
d- Mg2+
how many bonds arounds carbon atom in co2 molecule ??
1- 8
2- 3
3- 6
4- 4
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