The human body contains many elements from the periodic table. It is mostly composed of oxygen and carbon, but trace elements also have a significant role. The table gives the mass, in kilograms, of some elements found in the human body, based on a 70.070.0 kg person.

Atomic number	Element	Mass (kg)
88	oxygen	45.245.2
66	carbon	12.612.6
11	hydrogen	7.07.0
77	nitrogen	2.22.2
2020	calcium	1.31.3
1515	phosphorus	0.780.78
1919	potassium	0.250.25
1616	sulfur	0.180.18
	others	0.600.60
	total	70.070.0

Hydrogen makes up what fraction of the mass of the human body? Give your answer in decimal form.

fraction of H=

Hydrogen makes up what percentage of the mass of the human body?

% H=

What is the mass of phosphorus in a 17 kg17 kg person?

mass of P=P=