Answer:
Rn
Explanation:
Rn is the symbol for radon with the atomic number of 86
Answer:
I think the answer would be A.
Answer:
There are three significant figures in the number 20300
Answer:
Oxygen supports combustion so a good method of testing for oxygen is to take a glowing splint and place it in a sample of gas, if it re-ignites the gas is oxygen. This is a simple but effective test for oxygen.
Explanation: