What is the relationship between atomic weight, atomic mass and number of electrons?

Atomic weight refers to the ratio of the mass of an atom to the mass of a hydrogen atom;

Atomic mass is the actual mass of an atom;

The number of electrons is the number of electrons outside the nucleus;

Relationship: Atomic Weight = Atomic Mass Hydrogen atomic Mass.

Atomic weight, atomic mass, and the number of electrons have little to do with it.

Atomic weight is the ratio of the mass of an atom to the mass of 12 carbon.

Atomic mass is the actual mass of an atom;

Atoms are mainly composed of protons, neutrons, electrons, but the mass of electrons is so small that it is almost negligible. So it has little to do with atomic weight and atomic mass.

Atomic weight = mass of a certain atom 12 12 of the mass of the carbon 12 atomic mass number of protons + number of neutrons.

1 12 of the atomic mass of carbon-12

They also have speculations, you can think about it, who weighs a piece of iron and aluminum with the same area of length? If you divide them into equal weights, isn't it obvious that there is a little more aluminum than iron? Think for yourself,

Number of protons = number of hail = atomic number.

Number of neutrons = number of masses - number of hail of qualitative slippery talks.

Mass number = number of protons + number of neutrons.

The mass number is the value obtained by adding the approximate integer values of the relative masses of all protons and neutrons in an atom. Since the relative mass of a proton and a neutron is 1 when the approximate integer value is not observed, the mass number (a) the number of protons (z) and the number of neutrons (n).r relative atomic mass is based on the 1 12 atomic mass of a carbon-12 atom as a standard, and the ratio of the average atomic mass of any kind of atom to the 1 12 atomic mass of a carbon-12 atomic mass is called the relative atomic mass of the atom.

The difference between mass and relative atomic mass is that the same element has the same number of protons, but the number of neutrons may be different, i.e., nuclides. Nuclides of the same element are called isotopes to each other.

The mass number refers to the sum of the proton mass and the neutron mass in the nuclide, and the mass of different nuclides of the same element is different. The relative atomic mass is the average relative mass of each nuclide. There is only one value for the relative primordial eggplant mass of the same element.

The approximate relative atomic mass can also be calculated as the sum of the number of protons + the number of neutrons.

The mass number of an atom is defined as the mass of the atom by adding the approximate integer value of the relative mass of the proton and the neutron in the nucleus, ignoring the mass of the electron. Relative mass is similar to relative atomic mass in that it is based on the 1 12 atomic mass of carbon 12, and the true mass of the particle is compared with it.

The relative mass of the proton is , and the relative mass of the neutron is , and the approximate integer value is 1, so the mass number is equal to the number of protons plus the number of neutrons. The mass number must be an integer, only the atom has a mass, and there is no concept of the mass number of the element.

The relative atomic mass is divided into atoms and elements. The relative atomic mass of an atom is equal to the ratio of the mass of that atom to the mass of carbon-12 12 and is generally not an integer. The relative atomic mass of an element is equal to the sum of the relative atomic mass of each isotope of the element and the percentage product of the number of atoms of the isotope in nature, that is, the relative atomic mass of the element is an average value, and the relative atomic mass of the element is listed in the periodic table.

Relative atomic.

The mass is the average relative mass of each nuclideThe relative atomic mass of the same element is only one value.

Whereas, mass number is simply the number of neutrons plus electrons of a certain nuclide.

Another example is the following sentence, and you will understand.

Let the number of protons in the nucleus of an element be m and the number of neutrons n.

The relative atomic mass of the element cannot be determined from this. Only the relative atomic mass of this nuclide can be determined.

The mass number of the atom = the number of neutrons + the number of protons. So the mass of the atom must be an integer. The number of neutrons corresponds to a specific atom. For example, the mass number of carbon-12 is 12, the mass number of carbon-13 is 13, etc.

Whereas, relative atomic mass is the average relative mass of all atoms of an element. So there are decimal parts.

Of course, they have different meanings.

Numerically, the integer part of the mass relative to the atom = the mass of the proton.

The relationship between relative atomic mass, number of protons, number of neutrons.

Number of protons (= atomic number) = number of electrons.

This is the reason why atoms are electrically neutral.

For example, if the number of protons in an oxygen atom is 8, then the number of electrons outside the nucleus is also 8.

Number of neutrons = relative atomic mass of protons (or number of electrons or atomic number).

Because the mass of the electrons outside the nucleus is so small that it is basically ignored, the mass of the nucleus (the sum of the mass of the proton and the mass of the neutron) = the mass of the atom.

For example, the relative atomic mass of the element iron is about 56 (to be rounded) and the number of protons is 26, then it is 56 26 = 30 neutrons.

The number of neutrons varies from isotope to any element, so this method cannot be used to calculate the number of isotope neutrons.

The relationship between the relative atomic mass, the number of protons, and the number of neutrons is the mystery of the composition of matter.

The number of protons = the number of electrons, and the number of neutrons in the heavy nucleus, often greater than the number of protons, and the stability of the nucleus is maintained with strong force.

The number in the figure represents the smallest unit of indivisible positive and negative electromagnetic information - qubits (Qubit) (name physicist John. Wheeler John Wheeler famously said, "It from bit."

After the development of quantum information research, this concept was sublimated to the point that everything originates from qubits) Note: Bits are bits.

The number of electrons is equal to the number of electrons in the nucleus of the atom.

1. Atomic weight is the abbreviation of "relative atomic mass" that we usually talk about! Such as hydrogen h:

2. The ratio of the mass of an atom to (one-twelfth of the mass of a carbon dodeca) is the "relative atomic mass".

3. The formula quantity is the original "molecular weight", but some substances do not have a "molecular formula" (such as NaCl and so on do not have a molecule), we collectively refer to the "chemical formula", so the formula quantity is the ratio of the mass of a "chemical formula whole" to (one-twelfth of the mass of a carbon 12 atom)! It is also equal to the sum of the relative atomic masses of the atoms in the "chemical formula"! Such as copper cu:

Hope it helps!

It is the sum of the relative atomic weights of the atoms in an experimental molecule of a substance. Generally equal to molecular weight. For example, the molecular weight of sulfuric acid H2SO4 is. So is its formula.

The formula quantity is the sum of the atomic weights of the atoms in the chemical formula, which is a general statement. The relative atomic mass of an atom and the relative molecular mass of a molecule can both be called formula quantities.

The atomic weight is the true mass of the atom!

The relationship between relative atomic mass, number of protons, number of neutrons.