Question

Why does scandium have 9 electrons on the 3rd shell instead of 8?

[I don't understand Aufbau's principle BTW...]

Answer 1

Explanation:

BAC 90°, AC - 20 cm,

CD - 42 cm and AD - 34 cm.

A 20

15. IFAB || CD, then find the

vavlue of x in the

given figure

EOX

116

G

1249

O

pg

g -224

C

D

Or

B В

IfAB ||CD, then