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TiliK225 [7]
3 years ago
7

In which main energy level does the 'd' sublevel first appear? K (first main energy level) L (second main energy level) M (third

main energy level) N (fourth main energy level)
Chemistry
1 answer:
RoseWind [281]3 years ago
6 0

Answer:

M (third main energy level)

Explanation:

The third main energy level bears the first appearance of the 'd' sublevel. The principal quantum number(n) depicts the main energy levels in which an orbital is located. It takes values of n=1,2,3,4,5..... and it can be represented by the shells k,l,m,n.......

The subshells in these main orbitals are represented by s,p,d and f. For the K shell, the principal quantum number is m and its sublevel notations are s,p and d. This is where the d-sublevel first appears.

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bonufazy [111]

Water isn't being produced all around us because the hydrogen and oxygen are present in stable form.

<h3>How come water isn't being produced all around us?</h3>

Water molecule is produced when the unstable hydrogen reacts with unstable oxygen because they are very reactive. Due to their reactive nature, hydrogen and oxygen react with each other forming water molecule. So that's why we can say that water is not being produced around us due to stable form of hydrogen and oxygen.

So we can conclude that Water isn't being produced all around us because the hydrogen and oxygen are present in stable form.

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1 year ago
Hydrogen ions cannot exist alone but they exist after combining with water molecules true or false​
juin [17]
True because hydrogen ions combines with h2o to make hydronium ion, so in a sense h2o is acting like a base.
4 0
3 years ago
CH3CH2OH can interact with<br> other like molecules through ___?
kkurt [141]

Answer:  dispersion forces, dipole-dipole and hydrogen bonds

Explanation:

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3 years ago
Choose the statement below that is correct for gas particles according to KMT.
rewona [7]

Answer:

2.At a given temperature, the KE of all gases is the same.KE depends only on Kelvin temperature

Explanation:

The kinetic molecular theory of gases provides a succint expalantion and insight into the behaviour of gases. The assumptions of the theory are stated below:

  1. Gases are made up of large number of identical molecules which are moving at different speeds.
  2. Spaces occupied by molecules of gases are negligible compared to the volume of the container.
  3. Molecules of gases are independent of one another.
  4. The molecules collide with themselves and the walls of the container elastically.
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3 years ago
Write equations that show the processes that describe the first, second, and third ionization energies for a gaseous gadolinium
Inessa [10]

Answer:

Gd(g) → Gd^{+}(g) + e^{-} , Gd^{+}(g)→ Gd^{2+}(g) + e^{-}, Gd^{2+}(g) → Gd^{3+}(g) + e^{-}

Explanation:

Ionization energy is the energy required to remove an electron from a gaseous atom or ion.

The first ionization energy is the energy required to remove the valence electron(outermost) from a neutral atom:

Gd(g)→ Gd^{+}(g) + e^{-}

The second ionization energy is the energy required to remove next/second electron from x^{+} ion. The second ionization energy is always higher than the first:

Gd^{+}(g) → Gd^{2+}(g) + e^{-}

The third ionization energy is the energy required to remove third electron from x^{2+} ion:

Gd^{2+}(g) → Gd^{3+}(g) + e^{-}  

5 0
3 years ago
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