What is the first element on the periodic table?
A. Oxygen
B. Helium
C. Carbon
D. Hydrogen
100
3rd quarter moon
What comes after a waning gibbous?
200
Nucleus
What is the center of an atom called?
200
D
How many miles are in a light year ?
A. 4 trillion B. 7 million
C. 8 thousand D. 6 trillion
300
A.5
How many valence electrons, does Nitrogen (N) has?
A.5
B.15
C.2
D.14.007
300
A
How long does it take the Earth to revolve?
A. 365 1/4 B. 365
C. 365 1/2 D. Mason
400
C.18
In what group is Noble Gases are located at?
A.1
B.8
C.18
D.7
400
Revolve
Does the moon rotate or revolve ?
500
C.250 grams
One of the essential minerals in the human body is salt. How much salt (NaCl) is in the average adult human body?
A.1 kilogram
B.500 grams
C.250 grams
D.practically none