The element symbol for hydrogen is:
a) K
b) H
c) He
d) Hn
All
of the following are isotopes of hydrogen except:
a) tritium
b) hydronium
c) protium
d) deuterium
Which of the following is the most abundant element in the universe? NTS PST (B) -------2021
a) helium
b) hydrogen
c) aluminum
d) none of these
Approximately what percent of matter in the universe is believed to consist of hydrogen?
a) 25%
b) 50%
c) 75%
d) 90%
The name for hydrogen comes from words meaning:
a) water fearing
b) water forming
c) gas
d) fire forming
Which of the following is the most second abundant element in the universe?
a) helium
b) hydrogen
c) aluminum
d) none of these
