Yes I absolutely do! Seeing how NASA spent many years doing research to see if Mars was inhabitantable for life it has water! And scientists have theories that they're possibly could be a planet just like earth someone where put in the universe
Answer:
The mass number (A), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus. The mass number is different for each different isotope of a chemical element.
Answer:
50000 dollars or 5 e5
Explanation:
Mr. Garibay has 
dollars in his bank.
Scientific notation represents the data in the format of expanded number or with e character.
For instance, 5.0 * 10^4 dollars = 50000 dollars or 5 e5
Answer: Hydrogen and helium
Explanation:
