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laila [671]
3 years ago
8

If an element contains 8 electrons how many electrons will be placed in the 2nd valence shell?

Chemistry
2 answers:
blondinia [14]3 years ago
4 0

Explanation:

As it is given that the element contains a total of 8 electrons. So, electronic distribution of this element will be 2, 6.

That is, there will be two electrons present in first shell and there will be six electrons present in second valence shell.

Here, we also get to know that this element contains 6 valence electrons hence, it is a group 16 element.

Thus, we can conclude that if an element contains 8 electrons then 6 electrons will be placed in the 2nd valence shell.

RideAnS [48]3 years ago
3 0
If an element contains 8 electrons, then there would be 6 electrons that will be placed in the 2nd valence shell. Each shell in an atom can only take up a fixed number of electrons. For the first shell, only two electrons can be found. For the second shell, it can hold up to 8 electrons. However, for this case only six electrons can be found since the others are found in the first shell.
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Please help 15 points
Rus_ich [418]

Nitrogen gained 4 electrons.

Because Nitrogen's redox number went from +6 to +2, it must have gained 4 electrons (-4) in order to achieve this number. Thus, Nitrogen is reduced.

4 0
3 years ago
3. Calculate the average atomic mass for the sample of atoms shown below.
murzikaleks [220]

Answer:B:63.75

Explanation:(5/8 x 63)+(3/8 x 65)=(0.625 x 63)+(0.375 x 65)=63.75

8 0
4 years ago
In Period 3, from left to right in order, each successive
emmasim [6.3K]
Here are some trends you should know.
Electronegativity increases as you go right and up along the periodic table.
       So, (1) is wrong
Atomic mass increases as you go right and down along the periodic table.
       So, (2) is wrong
Proton number or atomic number increases as you go right and down in the table.
       So, (3) is correct
Metallic character increases as you go left and down along the periodic table.
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8 0
3 years ago
Read 2 more answers
2) If I have an unknown quantity (# of moles) of gas at a pressure of 32 atm, a volume of 70 L, and a temperature of 25˚C. How m
astra-53 [7]

Answer:

91.5 mol

Explanation:

Volume of gas = 70 L

Temperature = 25°C

Pressure = 32 atm

Moles of gas  = ?

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will convert the temperature.

25+273.15 = 298.15 K

By putting values,

32 atm × 70 L = n ×0.0821 atm.L /mol.K × 298.15 K

2240 atm.L = n ×24.48 atm.L /mol

n = 2240 atm.L / 24.48  atm.L /mol  

n = 91.5 mol

3 0
3 years ago
The pressure of a gas at constant temperature is increased by a factor od 4. By what factor does the volume change?
viktelen [127]

Answer:

A

Explanation:

The formula used is

PV = P1 * V1

P = x

P1 = 4x

V1 = 1

V2 = ?

x * 1 = 4x * V2          Divide both sides by x

x/x = 4x /x * V2

1 = 4*V2                   Divide by 4

1/4 = 4*V2/4

1/4 = V2

The answer is A

4 0
4 years ago
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