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slava [35]
3 years ago
11

4. How many electrons are in the electron shell closest to the nucleus?

Chemistry
2 answers:
Roman55 [17]3 years ago
5 0

Answer:

2

Explanation:

there are 2 electrons close to the nucleus

Serhud [2]3 years ago
5 0

Answer:

2

Explanation:

2*n^2, where n is the electron shell.

If we plug 1 in, we will get 2*1, which is 2.

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Platinum crystallizes in a face-centered cubic cell. the density of platinum is 21.4 g/cm3. calculate the radius of the platinum
IgorLugansk [536]
1 mole of platinum has a mass of 195 g therefore 1 atom will have a mass of 195 g /(6.02 ×10^23) = 3.239 × 10^-22 g
Density is given by dividing mass by volume, thus to get volume, mass is divided by density. 
The volume = (3.239 × 10^-22)/21.4 
                    = 1.514 × 10^-23 cm³
But volume of a sphere is given by 4/3πr³
Therefore, r³ = 3.6129 × 10^-24 
                 r   = ∛(3.6129 × 10^-24)
                      = 1.534 × 10^ -8 cm
Therefore, the radius of the platinum atom is 1.534 × 10^-8 cm

7 0
4 years ago
Para balancear una ecuacion quimica se cuenta el numero de:
dimaraw [331]

Explanation:

Para balancear un ecuacion quimica necesitas un coeficiente, eso es un numero entero. Asegurate de que haya el mismo número de átomos a cada lado de la flecha.

3 0
3 years ago
Which state of matter are required for energy transfer to occur when radiant energy is the source?
lisabon 2012 [21]

Answer:

No state of matter is required

Explanation:

When <em>radiant energy </em>is the source, we are talking about <em>energy transfer by radiation, </em>so matter is not needed for the energy to be transfered.

An example of this could be the Sun, it heats up the Earth by radiation, even through the vacuum of outer space, where there is next to no matter.

8 0
3 years ago
A student measures the mass and volume of a piece of aluminum. The measurements are 25.6 grams and 9.1 cubic centimeters. The st
Advocard [28]
The theoretical density of aluminum is 2.7 g/cm3. The experimental density is 25.6/9.1=2.8 g/cm3. The percent error is (2.8-2.7)/2.7*100%=3.7%≈4%. So the answer is (4) 4%.
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3 years ago
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How many quarts (qt) are in<br> 265 milliliters (mL)?
Elena-2011 [213]
0.28002238 Quarts i think so i’m sorry if this doesn’t help
8 0
3 years ago
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