Atomic Mass

Copper is a metal element. Atomic mass of it is 64.

Every sodium atom has 11 protons, the atomic number of sodium. The isotope with mass number 23 has (23 - 11) or 12 neutrons, because the mass number of an isotope is defined as the sum of the numbers of protons and neutrons in the isotope.

Cobalt is a metal element. Atomic mass of it is 59.

In 1869, Mendeleev organized his periodic table by increasing atomic mass (atomic weight), using what is called the "law of octaves," by which every 8th element in the sequence shared similar properties. This was first observed by John Newlands in his element table around 1863.

Neon is a non metal element. Atomic mass of it is 20.

Mass number = number of protons + number of neutrons in an atom

Molar mass of it is 32gmol-1. It is twice than an atom.

1 atomic mass unit is equivalent to the 1/12 the mass of a carbon-12 atom at rest. This is not considered an si unit because it is defined by a definition and not experimentally

Increases it by one.

However in some isotopes this results in the fission of the nucleus into two less massive ones. While the atomic masses of the new nuclei are random, they statistically peak at about 1/3s and 2/3s the mass of the original.

Argon is a non metal element. Atomic mass of it is 39.94.

It is not, The mass number is (A). The symbol for atomic mass is (ma)

"Atomic mass" varies depending on the isotope. However, the AVERAGE atomic mass, (what's printed on most periodic tables) depends on the frequency with which different isotopes occur in nature. Therefore, if one element has a higher atomic mass than another, it doesn't mean that that element IS more massive, it just means that the more massive isotopes of that element occur more frequently in nature. It is a much more constant and reasonable method of organization to organize based on the number of protons in an atom of the element, since if the number of protons changes, you've got a different element.

Also, an atoms properties are largely dependent upon the number of protons it contains, for the reason stated in the last sentence above.

As diamonds are almost pure carbon, the atomic mass would be carbon's atomic mass: 12.0107

The atomic number of fluorine is 9.
The atomic number of sodium is 11.

The element with the lowest average atomic mass is hydrogen (H) at 1.008 grams. The element with the highest is meitnerium (Mt) at 266 grams.

Isotopes are different forms of the same element with the same number of protons but different number of neutrons. The atomic number of oxygen is 8. So both oxygen-16 and oxygen-17 have 8 protons (and 8 electrons). You get the number of neutrons by subtracting the mass number by the atomic number, so they would have 8 and 9 neutrons respectively.

the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.

The relative atomic masses are:calcium: 40.078

scandium: 44.956

titanium: 47.867

The atomic mass is a property that refers to the average mass of an atom of an element. It is measured in atomic mass units (amu) or grams per mole. The atomic mass is not directly related to pounds, which is a unit of weight in the imperial system.

No! The mass of one atom of each element increases as you move down and to the right on a periodic table. The mass of an atom of a particular element is called its atomic mass.

The atomic mass generally increases as you go down a group in the periodic table. This is because as you move down a group, the number of protons and neutrons in the nucleus of the atoms increase with the addition of more energy levels or electron shells.

Cobalt (Co) has a smaller atomic mass than Lead (Pb). Cobalt's atomic mass is only 58.9332 while lead's is 207.2.

Atomic mass of Iodine is 126.90447 ± 0.00003 u.

protons is the same number as the atomic number always

and protons plus the average number of neutrons makes up the atomic mass

The atomic mass number of aluminum is 27. The atomic mass of aluminum is 26.98115386