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Jerald Orn

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โˆ™ 2021-10-27 18:34:48
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Cards in this guide (23)
How many protons are in an oxygen atom

Oxygen has 8 protons in the atom.

Can nitrogen form an ionic bond

nitrogen can form an ionic bond

Is it true that the atmosphere is mostly oxygen

No, mainly nitrogen

Which of the following is an organic molecule


CH4 for bio sem 1



{Apex Asnwers} C2H6

What is the term for anything that takes up space and has mass

Anything that takes up space and has mass is called matter.

What is the most common molecule in living things

The water molecule, H2O, comprises 70% or more of living creatures.

What are the fundamental units of matter called


Why is carbon important for forming complicated molecules

it can form four covalent bonds

it forms very strong bonds

Which molecule is most common in the human body

Water. It makes up about 65% of the human body.

What elements are in the most common substance in the human body

Hydrogen and Oxygen

Which of these is an example of a chemical change

Lighting A Match

Which three elements make up most of the human body

Short Answer:

By weight, oxygen makes up approximately 65% of the human body.

Carbon comes in second with 18% of the mass

Hydrogen adds 10% more of the mass.

These three account for 93% of the mass of the human body.

Numerically, hydrogen 63% of the total number of atoms in the human body, but it is probably closer to 63% for most people.

Accounting by Mass:

The mass of the human body is provided mostly by oxygen, carbon, hydrogen, nitrogen. Together these elements account for about 96% of the mass of a human.

Add in about a kilogram of calcium in the bones and body fluids and you are up to 97.4%. All of this depends on the particular person since water, our major component, can differ by 10% from one individual to another.

That said, typically the breakdown goes like this.

Oxygen: 65% of the mass

Carbon: 18% of the mass

Hydrogen: 10% of the mass

Nitrogen: 3% of the mass

Calcium: 1.4 % of the mass

Phosphorus 1.1% of the mass

With phosphorus, one has accounted for 98.5% of the mass of the typical human and that will change by a couple of tenths from person to person.

Accounting by Numbers:

Numerically we have nearly twice as many hydrogen atoms in our bodies as compared to all other elements combined. Specifically, hydrogen counts as 63% of our atoms by number, give or take a bit, but being so light it barely gets to 10% of our mass. Oxygen atoms count as 24% and carbon atoms are a mere 12% of the populations. Together, our three basic organic building blocks account for 99% of all the atoms in the body.


As was said above, the water content of the human body weight varieties between 55 to 65 % from one person to the next and being the major component changes the numbers above a little for each individual.


Almost 99% of the mass of the human body is made up of the six elements oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.

Most of the last 1% is made up of five elements: potassium, sulfur, sodium, chlorine, and magnesium, but a tenth of a percent or so is made up of another dozen or so elements which include those recognized as essential to health such as iron, iodine and fluorine as well as beneficial trace elements like manganese, copper and zinc.

Why are proteins considered organic molecules

They contain many carbon atoms

Which would prevent a plant from growing

Lack of sunlight

Which produces an ionic bond

Creating an electrostatic attraction produces an ionic bond.

How many electrons are in this atom

You need to specify the atom.

Which best describes the role of carbon in the body

used in proteins

Nitrogen gas reacts with hydrogen gas to form ammonia What are the reactants in this chemical reaction

Nitrogen gas and hydrogen gas

In what way are all living organisms on earth similar

All organisms use the same genetic code.Living organisms are made of the same components as all other matter, organisms that inhabit the earth at any one time

they are all assembled from a nucleic acid code

What is directly responsible for matter moving and changing in an animals body


What kind of molecule is represented in the diagram

a lipid

What statement is true about gold and silver

They are both made of subatomic particles.

What is the following is most likely the result of an organism having lipids in its body

water cannot be absorbed through the surface of a leaf

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