Which of the following is the symbol for carbon?
a) Ca
b) Cu
c) C
d) Cn
Which of the following is the symbol for calcium?
a) Ca
b) Cu
c) Cm
d) Cn
Which of the following is the symbol for sodium?
a) S
b) Na
c) So
d) Sm
Which of the following element most of the human body?
a) Carbon
b) Hydrogen
c) Nitrogen
d) Oxygen
How much percentage of Oxygen element makes the human body?
a) 3%
b) 9.5%
c) 18%
d) 65%
How much
percentage of Nitrogen element makes the human body?
a) 3%
b) 9.5%
c) 18%
d) 65%
