0
Wiki User
∙ 14y ago16 is the typical mass number
Add your answer:
Earn +20 pts
Which two atoms are most common in the human body?
By atoms: hydrogen, oxygen, and carbon By mass: oxygen, carbon, hydrogen
What is oxygens number of neutrons?
All oxygen atoms have 8 protons. Most oxygen atoms have 8 neutrons as well. On the Periodic Table, oxygen's average atomic mass is 15.9994. Most oxygen, therefore is 168O or O-16. However, there are very small amounts of oxygen's additional isotopes, which have a different number of neutrons (but again, all oxygen has 8 protons.) This causes the weighted average of all the isotopes to "drift" away from being a whole number.
How much oxygen in grams will be required to react with 0.5 mole of aluminium?
Three atoms of oxygen are required to react with each two atoms of aluminum to form the most common product of reaction between oxygen and aluminum. Therefore, 0.75 mole of oxygen atoms will be required to react with 0.5 mole of aluminum atoms. The atomic weight of oxygen is 15.999; therefore, the mass will be (0.75)(15.999) = 12 grams of oxygen, to the maximum possibly justified number of significant digits.
Which is our most abundant elements in the body?
In number of atoms (element) hydrogen is the most abundant, not in mass.
Are most atoms their mass number is the same as their atomic number?
No. In most atoms the mass number is at least twice the atomic number. A mass number that is the same as the atomic number would indicate a nucleus with no neutrons. Such a nucleus would be highly unstable except in the case of the hydrogen-1 nucleus, which consists of a single proton. In most other stable nuclei there are at least as many neutrons as their are protons. The mass number is the sum of the number of protons and the number of neutrons.
Which two atoms are most common in the human body?
By atoms: hydrogen, oxygen, and carbon By mass: oxygen, carbon, hydrogen
What is oxygens number of neutrons?
All oxygen atoms have 8 protons. Most oxygen atoms have 8 neutrons as well. On the Periodic Table, oxygen's average atomic mass is 15.9994. Most oxygen, therefore is 168O or O-16. However, there are very small amounts of oxygen's additional isotopes, which have a different number of neutrons (but again, all oxygen has 8 protons.) This causes the weighted average of all the isotopes to "drift" away from being a whole number.
What do you know about all of atoms in the elements oxygen?
2 atoms of oxygen joined togetherBy mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. At STP, two atoms of the element bind to form dioxygen.
What do you know about all the atoms in the element oxygen?
2 atoms of oxygen joined togetherBy mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. At STP, two atoms of the element bind to form dioxygen.
Most calcium atoms have an atomic number of 20 and a mass number of 40 but some calcium atoms have a mass number of 48 What word could you use to describe these two kinds of calcium atoms?
Isotopes.
From which atoms does oxygen can be made?
Oxygen is made up of It is replenished by plants and other photosynthetic organisms. Oxygen also makes up most of Earth's oceans by mass. A water molecule (H2O) is made up of two hydrogen atoms and one oxygen atom. Although there are more hydrogen atoms in water, hydrogen has less mass.
How much oxygen in grams will be required to react with 0.5 mole of aluminium?
Three atoms of oxygen are required to react with each two atoms of aluminum to form the most common product of reaction between oxygen and aluminum. Therefore, 0.75 mole of oxygen atoms will be required to react with 0.5 mole of aluminum atoms. The atomic weight of oxygen is 15.999; therefore, the mass will be (0.75)(15.999) = 12 grams of oxygen, to the maximum possibly justified number of significant digits.
What are the 3 most common elements found in living things important to the human body?
The three most common atoms in the body would be carbon, hydrogen, and oxygen. By atoms: hydrogen, oxygen, and carbon By mass: oxygen, carbon, hydrogen
Which is our most abundant elements in the body?
In number of atoms (element) hydrogen is the most abundant, not in mass.
Most abundant element in the body?
Me and thee are mainly water, so hydrogen will be the most abundant in terms of number of atoms. However, by mass the body is mostly oxygen.
Which element makes up the largest percentage of all elements on earth?
water LOL. Water is NOT an "element". This is also an ambiguous question because it all depends on how you measure elements. For instance, you can measure an elements' "abundance" by mass or you can measure it by number of atoms. For instance, in water the most abundant element by mass is oxygen (85% of the mass of water), but by mole (# of atoms), it is hydrogen because water is H2O and therefore there are twice as many H atoms and O atoms in any amount of water. If you are referring to the earth's crust, then oxygen is the predominant element by mass, taking up 45% of the mass of the earth. By mole, hydrogen is the most abundant. If you include the atmosphere, then nitrogen predominates by mole, but oxygen continues to predominate by mass. This is not a simple question ;) but it DEFINITELY is NOT Water :-)
Are most atoms their mass number is the same as their atomic number?
No. In most atoms the mass number is at least twice the atomic number. A mass number that is the same as the atomic number would indicate a nucleus with no neutrons. Such a nucleus would be highly unstable except in the case of the hydrogen-1 nucleus, which consists of a single proton. In most other stable nuclei there are at least as many neutrons as their are protons. The mass number is the sum of the number of protons and the number of neutrons.
