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natta225 [31]
3 years ago
6

What is the maximum number of electrons in the second electron shell, closest to the nucleus?

Chemistry
1 answer:
Ierofanga [76]3 years ago
8 0
8 is the maximum number
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Which alignment of the Sun, Moon, and Earth causes a lunar eclipse? А. B. C. D.​
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A.

Explanation:

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The atomic mass of the elements M,X and Q are 6,11 and 17 respectively. Use the valency electrons to explain how the atoms M and
Mamont248 [21]

Answer:

M is Li, X is boron, and Q is oxygen.  MX is LiB, lithium bromide.  QX is BO, boron oxide (not Body Odor).

Explanation:  The atomic masses don't match exactly with those listed in the periodic table.  Boron, Oxygen, and Lithium come the closest.

Lithium reacts with bromine since it happily donates it's single 2s electron to bromine's 4p orbital to fill bromine's 4s and 4p valence orbitals to go from 7 to 8 valence electrons, it's happy state.

Boron reacts with oxygen to form B2O3, which I'll happily write as O=BOB=O, since my name is Bob.  This is more complex, but both elements want to move electrons around in order to reach a more stable electron configuration.  Boron has 3 valence electrons and oxygen has 6.  So each oxygen needs 2 electrons to fill it's outer shell and boron is happy to lose it's 3 valence electrons to reach an outer shell equiovalent to helium.  So 2 borons contribute a total of 6 electrons, and the 3 oxygens have room for a total of 6 electrons to fill their outer shell.

8 0
3 years ago
85g=kg?<br> Unit conversion.
Paraphin [41]

Answer:

0.085 kg

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1 g=0.001 kg  OR 1 kg=1000 g

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3 0
3 years ago
A vessel contained N2, Ar, He, and Ne. The total pressure in the vessel was 1100 torr. The partial pressures of nitrogen, argon,
geniusboy [140]

Answer:

Partial pressure Ne = 340 Torr

Option B

Explanation:

Gases contained in the vessel:

N₂, Ar, He, Ne

One of Dalton's law for gases determine this:

In a mixture of gases contained in a vessel, total pressure of the system must be the sum of partial pressure of each gas.

Total pressure = 1100 Torr

Let's replace:

Partial pressure N₂ + Partial pressure Ar + Partial pressure He + Partial pressure Ne  =  1100 Torr

Partial pressure Ne = 1100 Torr - Partial pressure N₂ - Partial pressure Ar  -Partial pressure He

Partial pressure Ne = 1100 Torr - 110 Torr - 250 Torr - 400 Torr

Partial pressure Ne = 340 Torr

8 0
3 years ago
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