The atomic weight of a molecule is the weight of all the molecules in it combined.
Example: H20
Hydrogen: 1.01
Oxygen: 16.00
2 hydrogens = 2.02 + 16.00 = 18.02 is the atomic weight of water.
The chemical properties of an atom are determined by its atomic number, which corresponds to the number of protons in the atom's nucleus. The number of protons influences the atom's interactions with other atoms and its ability to form chemical bonds.
An atom of oxygen has twice the weight of an atom of nitrogen since the atomic weight of nitrogen is around 14 amu (atomic mass units), while the atomic weight of oxygen is around 16 amu.
an oxygen and a hydrogen atom do not weight the same
The atomic weight of an element is determined by the weighted average of the masses of its isotopes, taking into account their abundance in nature. This value is typically found on the periodic table as the average atomic mass of the element.
The atomic weight of hydrogen is 1,007 94 ± 0,000 07 atomic units of mass.
The atomic weight of chemical elements is determined by mass spectrometry.
The atomic number of an atom is determined by the number of protons it has.
The chemical properties of an atom are determined by its atomic number, which corresponds to the number of protons in the atom's nucleus. The number of protons influences the atom's interactions with other atoms and its ability to form chemical bonds.
Atomic mass of an atom is determined by the combined masses of its protons, neutrons, and electrons. Protons and neutrons contribute most of the mass, as they are much heavier than electrons. The atomic mass is usually given in atomic mass units, where 1 unit is defined as 1/12 the mass of a carbon-12 atom.
By the atomic mass
The atomic mass of an atom is determined by the total number of protons and neutrons in its nucleus. Protons and neutrons contribute to the majority of an atom's mass, electrons have negligible mass in comparison. The atomic mass unit (amu) is used to express atomic mass, with 1 amu approximately equal to the mass of a proton or neutron.
Atomic Mass is the number of protons in an atom plus the number of neutrons in the same atom.
Atomic number.
The Atomic Number
The atomic number is determined by the number of protons in an atom. Therefore, if an atom has 65 protons, its atomic number is 65.
An atom of oxygen has twice the weight of an atom of nitrogen since the atomic weight of nitrogen is around 14 amu (atomic mass units), while the atomic weight of oxygen is around 16 amu.
You subtract the atomic number from the atomic weight. For example, if you have a helium atom and its atomic weight is 4 and you subtract its atomic number (2) the number of neutrons in the helium atom is 2.