Top Answer

100 2s for the hundreds digit of 200-300

10 2s for the tens digit of 220-230

10 2s for the ones digit of 200-300

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120 '2s'

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300 sir

the 2s orbital is at a higher energy level

4

You can tell the difference between 2s sub-shell and 2p sub-shell by checking their energy levels whereby a 2p orbital has a higher energy level compared to a 2s orbital.

You can tell the difference between a 2s sub-shell and 2p sub-shell from their energy levels, because a 2p sub-shell is a higher energy level than a 2s sub-shell.

310.

25 of them

1

unknown

36

1

20 of them.

33

26

46.

Seven of them.

2

39

240 ÷ 2 = 120

Exactly 18 of them

It has 17 of them with a remainder of 1

Exactly 16

5,0 moles (NH4)2S contain 60,22140857.10e23 ammonium ions.

150 g x 1 mol/68.154 g = 2.2 moles (2 sig figs)

The compound (NH4)2S is ammonium sulfide.