Atomic Mass

The average atomic mass of potassium is approximately 39.10 atomic mass units (amu). This value is calculated by taking into account the different isotopes of potassium and their relative abundances in nature.

Lithium is a meta element. Atomic mass of it is 7.

205

Anything that has a mass is considered to be matter. Mass is a property of matter that measures its resistance to acceleration when a force is applied. Everything in the universe that has mass is made up of particles, such as atoms and molecules.

The average atomic mass for cobalt is approximately 58.93 atomic mass units. It is calculated by taking into account the different isotopes of cobalt and their relative abundance in nature.

Plutonium's atomic mass is 244,064 204 (5) because the only naturally occurring isotope is 244Pu. Interestingly, we manufacture or synthesize a much more of other isotopes.

The atomic mass of the most important isotope of plutonium (239Pu) is:

239,052 1634 (20).

The atomic number of plutonium is 94. For the mass of other isotopes see the link below.

Atomic masses are from the tables of Audi, Wapstra and Thibault (AME 2003).

number of moles = mass of the material/molar mass

The lightest element in the group 2 of the periodic table of elements is calcium - with a density of 1,55 g/cm3.

When it comes to atomic mass, each proton and each neutron (they're called nucleons when we talk about them in an atomic nucleus) in the nucleus of an atom add about 1 to the atomic mass. Just as a for instance, most hydrogen has just a proton for a nucleus. But some has a neutron attached to the proton, or, in extremely rare instances, two neutrons. In the case of "regular" hydrogen, its atomic mass is about 1 while hydrogen with a neutron stuck to its proton has an atomic mass of about 2. Atomic mass has to take into account some subtleties as regards atoms. Use the links below to sort it out.

Do the atomic mass of each element/ compound which makes up air divided by 100 and then times by the percentage that the element exists in air. This should give you the mass that each element/ compound contributes to the atomic mass of air. Add them all together to get the overall atomic mass of air.

(I calculated this and it came out at 25.6 3sf )

The answer is 2,107749515.1025 molecules.

youm dont

The density of pure copper is: 8.94 g/cm^3

The density of pure zinc is: 7.13 g/cm^3

The element is gallium and the isotope is 31Ga70

The atomic number of C13 is still 6, the same as C12. The difference lies in the number of neutrons, not protons. The number of neutrons does not radically change the element, which is why they are called isotopes. The C13 isotope is 1.1% of all naturally occurring carbon atoms, the C12 group having 98.9%

the answer is the atomic mass unit

The atomic mass unit is 1/12 from the mass of the isotope 12C.

Atomic mass is the sum of the number of protons and neutrons in the nucleus. The reason it is typically found in decimal form is because it is using the average number of neutrons, from all the different isotopes of that element.

Hydrogen is a non metal element. Atomic mass of it is 1.0079.

It's just 4.002602 amu

It's the mass of an atom expressed as a multiple of 1/12 of the mass of a carbon-12 atom at rest. Please see the link.

Isotopes of a element are simply versions of that same element with different count of neutron, with that in mind they take all of the isotopes of a specific element and average them together taking in account the percent abundance of each so the most common isotope is the one on the periodic table.

since the total is 68 we will subtract 42 to find the amount of oxygen which is 26. u can do this one of two ways

1- 42:26 is the ratio of nitrogen to oxygen in the following compound, so no it is not nitrous oxide because 42/26 = 1.62 while 7/4 = 1.75 close but not it