Answer:
Hello! Your answer would be, D) HCI
Explanation:
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Explanation:
Electron configuration can be carried out in two steps which can be:
- Sublevel notation
- Shell notations.
In the sublevel notation, the sequence of filling electrons into the orbitals of the sublevels are guided by some principles:
- the maximum number of electrons in the orbital of sublevels are two for s-sublevel, six for p-sublevel, ten for d-sublevel and fourteen for f-sublevel. This indicates that the maximum number of electrons in an orbital is two.
- Aufbau's prinicple states that sublevel with lower energies are filled up before those with higher energies.
- Pauli exclusion principle states that no two electrons in an atom can have the same set of the four quantum numbers.
- Hund's rule states that electrons go into degenerate orbitals singly first before pairing occurs.
Using the shell notation, numbers are used to denote the sum of electrons in all orbitals each energy level.
For an atom of Be:
Sublevel notation for the 4 electrons 1s²2s²
Shell notation 2,2
Other representation is using the electron dot structure.
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electronic configuration brainly.com/question/9616334
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A small atomic radius
Explanation:
Elements like calcium located towards the top of a group have high attraction for their valence electrons because they have a small atomic radius.
The farther electrons are from the nucleus the lesser the attraction from the nucleus on them.
Atomic radius is taken as half of the internuclear distance between two covalently bonded atoms of non-metallic atoms or half the distance between two nuclei in the solid state between metals.
The smaller the atomic radius the greater the pull of the valence electrons in an atom.
Down the group, atomic radius increases due addition of new electronic shells.
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Effective nuclear charge brainly.com/question/5441986
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The chemical reaction is
<span> M2+(aq) + 2L(aq) <==> ML22+(aq)
</span>Intial concentration 0.10 0.10
Change -x -2x +x
Equilibrium 0.10 - x 0.01 = 0.10 - 2x x
Solving for x
0.01 = 0.10 - 2x
x = 0.045
The equilibrium concentration of ML22+ is 0.045 mol L-1
Answer:
Explanation:
Hello!
In this case, since the formation reaction of a compound is undergone when the pure elements composing it are combined, for gaseous hydrogen peroxide, gaseous diatomic hydrogen and oxygen (standard state) must be combined in order to obtain the gaseous hydrogen peroxide as shown below:
Whereas it is proved there are two hydrogen and oxygen atoms at each side of the chemical equation and therefore it is balanced.
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