What is the mass number of most atoms of oxygen?
Oxygen is a non metal element. Atomic mass number of it is 16.
16 is the typical mass number
About 18% by mass, and 12% by number of atoms. It is, by mass, the second most abundant element in our bodies, after oxygen. Byatom number - it is the third (after hydrogen and oxygen).
By atoms: hydrogen, oxygen, and carbon By mass: oxygen, carbon, hydrogen
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
For most manganese atoms, the mass number is 55.
The atomic number of the oxygen atom is 8.
Not all, but most. Oxygen can exist as O-16, O-17, or O-18. All three isotopes are stable, although most oxygen atoms have an atomic mass of 16.
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.
by number of atoms- hydrogen by weight - oxygen The most abundant element in the human body is oxygen. About two thirds (65%) of the human body is oxygen by mass. The most abundant metal in the human body is calcium.
Not all oxygen atoms have the same number of neutrons. However, the very large majority have 7 neutrons (some have slightly more or less than that). Number of neutrons = Atomic mass of an isotope - atomic number (number of protons) The most important stable isotope of oxygen is 16O (99.76 % in the mixture of natural oxygen isotopes); this isotope has 8 neutrons.
2 atoms of oxygen joined together By 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.
3 for the atomic mass 6.941 for the atomic number
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.
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.
By molar amount, hydrogen and oxygen are the most common elements; carbon is the third. By mass, oxygen is the most common, and carbon is the second (with hydrogen being third by mass). By mass, oxygen is the most abundant, and phosphorus is the least, carbon the 2nd, hydrogen, 3rd. By atoms, hydrogen is most abundant, and phosphorus the least, oxygen 2nd, carbon 3rd.
The number of electrons in the outer most energy level of oxygen is 6.
In number of atoms (element) hydrogen is the most abundant, not in mass.
For the most disaccharides the ratio is 2.
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… Read More
Atomic percent is based on the number of atoms in a sample. So if the sample has x number of oxygen atoms and x number of iron atoms it would report 50% oxygen and 50% iron (atomic percent). Weight percent is based on the mass of the elements detected. So if we used the above example and reported the results as weight percent we would get 22.3% oxygen and 77.7% iron. Weight percent takes into… Read More
If you are asking which element contributes the most to its mass then it is oxygen. If you are asking which element contributes the most atoms to its molecule then it is hydrogen.
Yes. The most common isotope of oxygen is oxygen-16, and the atomic number of oxygen is 8. The number of neutrons is the isotope mass number minus the atomic number, and 16 - 8 = 8.
Hydrogen is the lightest of all elements, having atoms that are only a fraction of the mass of all other elements. For example, an oxygen atom has about 16 times the mass of a hydrogen atom. So while a water molecule contains 2 hydrogen atoms and 1 oxygen atom (and water makes up most of the human body), the single oxygen atom accounts for most of the mass of the molecule.
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… Read More
The most important difference is the number of protons: nitrogen has 7 protons, oxygen has 8 protons.
If you are wondering by weight, it is: OXYGEN If you are wondering by number of atoms it is: HYDROGEN If you might wanna know, or more info...Here is this: The MOST abundant element in the human body is oxygen. It cover about two thirds. (Around 65% (in percentage) If you are looking by mass.
The same number as an atom of oxygen. For the most common isotope, oxygen-16, the number is 8, the mass number minus the atomic number.
Rutherford said most of an atoms mass is its nucleus in 1911
"The world" could be taken to mean the universe as a whole or Earth specifically. The most common atom in the universe is hydrogen. The most common atom in Earth's crust is oxygen. Slightly more of the Earth's total mass comes from iron (about 32% iron, 30% oxygen), but since an iron atom is a bit over three times the mass of an oxygen atom, there are still more oxygen atoms than iron atoms in… Read More
is the element with atomic number 8 and represented by the symbol O. Because it comprises most of the mass in water, oxygen comprises most of the mass of living organisms (for example, about two-thirds of the human body's mass) Oxygen is a member of the chalcoqen groupof the periodic table.
Hydrogen and oxygen Water is the most common molecule, between 55 and 65% of our mass. Hydrogen accounts for 63% of our atoms, but oxygen accounts for 65% of our mass. (Both hydrogen and oxygen are part of many other molecules besides water.)
What is the number of potassium atoms compared to oxygen atoms in a compound made from these two elements?
There are 2 'K' and 1 'O' atoms in K2O, the most common Potassium oxide. However, two other potassium (super- and per-) oxides are known: Potassium superoxide: KO2: 1 potassium atoms and 2 oxygen atoms Potassium peroxide: K2O2: 2 potassium atoms and 2 oxygen atoms
Water is not an element, it is made of Hydrogen and Oxygen. Oxygen is the most plentiful element in the human body by weight. If you go by number of atoms, then Hydrogen would be the most plentiful.
most of the mass comes from the atoms nucleus (protons and neutrons) the electrons are extremely small in comparison
The mass number of an element is determined by the number of protons and neutrons present in the most abundant form of its atoms. For example, carbon has an atomic number of 6, so it has 6 protons. The most abundant form of carbon has an atomic weight of 12, therefore carbon atoms must have 6 neutrons and 6 protons. The atomic mass can be found from the difference between atomic weight and atomic number.
A neutron is a subatomic particle found in the nuclei of most atoms. Mass number is the sum of protons (atomic number) and neutrons in the nucleus in an atom of a particular isotope.
Oxygen has the valency of 2 in most of the compounds.
oxygen normally forms a convalent bond with one or two other oxygen atoms. as well as oxygen atoms forming oxygen molecules, oxygen atoms tend to form bonds with most of the other elements to form oxides. oxygen atoms on there own are rare. as for phosphorous.........
In this and most other oxygen-containing anions, oxygen is assigned an oxidation number of -2. Since there are two oxygen atoms and one additional unpaired negative charge, nitrogen must have an oxidation number of +3.
You have to be careful here. Atomic number is a whole number: it's simply the number of protons in each element. You can't have half of a proton in an atom, it just doesn't work. Atomic number/the number of protons has to be a whole number. Mass number is the number that wouldn't be a whole number. It is the average of the masses (the protons+neutrons) of all of the atoms of the element on… Read More
The oxygen most often comes from the atmosphere which is 21% oxygen.
Oxygen is the major element in terms of mass. Hydrogen is the leading element in terms of atomic percent. Water is the major compound. Hydrogen accounts for 63% of our atoms, but oxygen accounts for 65% of our mass. See Sources and related links for a breakdown.
Given thatI am unclear as to the exact isotopes of Oxygen, I would assume that the only difference between them are the change is mass number. i.e there may be (one ) less or (one ) more neutron(s) in the nucleus of the oxygen atoms. This is the easiest explanation for what an isotope of any element is. Mass spectrometry is used to determine the exact mass number of each element, given that (to my… Read More
Hydrogen is the most common element in the universe as a whole; about 75% of the universe by mass is hydrogen (since hydrogen is also the lightest element, that means that the percentage by number of atoms is even higher) . Helium is second; oxygen is a fairly distant third.
More then 99% of an atoms mass is in the nucleus.
mass of protons + mass of neutrons
When 2.56g of a compound containing only carbon hydrogen and oxygen is burned completely 3.84g of co2 and 1.05g of h2o are produced What is the empirical formula of the compound?
The gram molecular mass of carbon dioxide is 44.01, and the gram molecular mass of water is 18.015. Therefore, 3.84g of carbon dioxide constitutes 3.84/44.01 or about 0.08725 mole of carbon dioxide, and 1.05g of water constitutes 1.05/18.015 or about 0.05828 mole of water or 0.1157 gram atoms of hydrogen, since each molecule of water contains two hydrogen atoms. Therefore, the ratio of the numbers of hydrogen atoms to the numbers of carbon atoms is… Read More
phospororus and oxygen are elements. to know they're atomic number and mass, check the periodic table. oxygen is the most abundant element on earth and is usually found as a gas. (you breathe oxygen.)
im sorry but this is most stupidest question i ever seen how many oxygen are in Kr2CrO7 try looking at number at the end of letter O
The mass number of a nitrogen atom is determined by the mass of the nucleus. As it is the relative mass, it is equal to the combined number of protons and neutrons in the nucleus of the atom. For example, the most common isotope of nitrogen contains seven protons and seven neutrons, giving it a mass number of 14. Some atoms of nitrogen have an extra neutron, which gives a mass number of 15.