Answer:
To determine how many electrons fit in each energy level, use the formula:
2n²
N is equal to the number of energy levels. Using this formula, we can determine that there are:
- First energy level holds 2 electrons
- Second energy level holds 8 electrons
- Third energy level holds 18 electrons
- Fourth energy level holds 32 electrons
- And so on...
Keep in mind though, that for an atom's outermost shell, it can only contain 8 valence electrons due to the octet rule that states that an element only needs eight electrons in their outermost shell in order to be stable.
The non living things to help it survive would be the sun,water, and soil so that's is the answer
Density = mass/volume
Density = 25 grams/ 125 cm³ = 0.2 g/cm³
Answer : The mass of 7.0 m chain is, 15.12 kg
Explanation :
As we are given that,
The weight of the chain per unit length = 2.16 kg/m
Now we have to determine the mass of chain for 7.0 m length.
As, the mass of 1 m length of chain = 2.16 kg
So, the mass of 7.0 m length of chain = 
= 15.12 kg
Therefore, the mass of 7.0 m chain is, 15.12 kg
