Answer:
Explanation:
If the gas pops when the top of the test tube is placed close to a flame it is hydrogen,
If it re-ignites a glowing splint it's oxygen.
Otherwise the gas is nitrogen.
They have the same number of electron shells.
PERIOD 1: K shell
PERIOD 2: K, L shell
PERIOD 3: K, L, M shell
etc.
The answer would be A be cause it is the most reasonable answer
Answer:
7.35 to 7.45
Explanation:
According to healthline.com, the average pH of blood is 7.35 to 7.45.
