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.
Explanation: Process is diffusion. The gas molecules follow a zig-zag path through the tube as they collide with the air molecules in the tube. The purpose of the glass tube is to eliminate air currents and to see if the gas molecules will move on their own.
<u><em>I guess this helped you</em></u>
<em><u>I hope you would mark me as BRAINLIEST!!</u></em>
Answer:
4 enzymes responsible for digestion:
1. Salivary amylase ---- substrate: Starch ---- end-product: Maltose
2. Lipase ---- substrate: Lipids (fats and oils) ---- end-product: Fatty acids and glycerol
3. Maltase ---- substrate: Maltose ---- end-product: Glucose
4. Protease ---- substrate: Protein ---- end-product: Amino acids
1.96 pounds, i hope this helped.
This is probably true but I’m not 100% sure
