Answer:
the 4s subshell is lower in energy than the 3d subshell
Explanation:
In the element number 24 which is chromium
the electronic configuration should be according to Aufbau principle
will be = ![1s^22s^22p^63s^23p^64s^23d^4](https://tex.z-dn.net/?f=1s%5E22s%5E22p%5E63s%5E23p%5E64s%5E23d%5E4)
but in reality it is = ![1s^22s^22p^63s^23p^64s^13d^5](https://tex.z-dn.net/?f=1s%5E22s%5E22p%5E63s%5E23p%5E64s%5E13d%5E5)
The 6 electrons in the outermost shell will be divided as 5 in 3d subshell and 1 in 4s shell, because half filled orbital
will be more stable than
.
Oxidation numbers play an important role in the systematic nomenclature of chemical compounds. By definition, the oxidation number of an atom is the charge that atom would have if the compound was composed of ions. The oxidation number of simple ions is equal to the charge on the ion. The oxidation number of sodium in the Na+<span> ion is +1.</span>
The particles cannot move around at all. The particles are, however, still in motion.
1 milligram =
.000001000000 kg
The formula that we will be using is:
total salt / total solution = .10
Let a be the ml of the first solution
And let b be the ml of the second solution
.25a + .05b / a + b = .10
Also:
a + b = 1400
a = 1400 - b
So substitute:
.25 x (1400 - b) + .05b / 1400 = .10
350 - .25b + 0.05b/ 1400 = .10
350 - .2b / 1400 = .10
350 - .2b = .10 x 1400
.2b = 350 - 140
.2b = 210
b = 1050
a = 1400 - b
a = 1400 - 1050
= 350 mL