2n² rule:
This rule is used to determine number of electrons in particular shell.
n=1 means K shell
n=2 means L shell
n=3 means M shell
n=4means N shell
The first K shell can hold upto 2 electrons, L shell can hold up to 8, third M shell can hold up to 18and the fourth N shell can hold upto 32 electrons. This rule of arrangement of electrons according to the shell is known 2n2 rule where n means number of shell.
For example: There is one proton in the nucleus of hydrogen atom, which moves in K shell path. It has no neutron.
We know, Kinetic energy (movement of the particle) is directly proportional to the temperature of the object. When you decrease the temperature, it's movement will also decrease and object particles move slower.
In short, Your Answer would be Option B
Hope this helps!
Answer:
That's a major lab mistake! Never pour chemicals in sink unless otherwise stated by the lab instructor. They should go in a properly labelled waste jar or similar container. Apparatus should not be left in sink, it should be washed and cleaned, and returned to where it came from.
Explanation:
D=m/v ⇒ v=m/d
d=density
m=mass
v=volume
Density (Fe)=7.86 g/cm³=7.86 g/ ml
m=4.18 Kg.(1000 g/1Kg)=4180 g
v=m/d=(4180 g) / (7.86 g/ml)=531.8 ml
v=531.8 ml*(1 dl / 100 ml)=5.32 dl
v=5.32 dl
