# Neon Mass Number

Neon Properties: The melting point of neon is -248.67°C, boiling point is -246.048°C (1 atm), density of gas is 0.89990 g/l (1 atm, 0°C), density of liquid at b.p. Is 1.207 g/cm 3, and valence is 0. Neon is very inert, but it does form some compounds, such as with fluorine. ›› neon molecular weight. Molar mass of Ne = 20.1797 g/mol. Convert grams neon to moles or moles neon to grams. Of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together. Neon is a chemical element with a chemical symbol Ne and atomic number 10. It is a noble gas that is colorless, odorless, inert and monatomic. It is the fifth most abundant chemical element in the universe by mass but a rare element on Earth. Three isotopes of neon exist, neon-20, neon-21, and neon-22. Isotopes are two or more forms of an element. Isotopes differ from each other according to their mass number. The number written to the right of the element's name is the mass number. 19.992*0.9048+20.993*0.0027+21.991+0.0925 = 20.1797 amu (C)

20.180042 amu

Explanation:

From the question given above, the following data were obtained:

Isotope A (20Ne)  Mass of A = 19.9924356 amu

Abundance (A%) = 90.48%

Isotope B (21Ne):

Mass of B = 20.9938428 amu

Abundance (B%) = 0.27%

Isotope C (22Ne):

Mass of C = 21.9913831 amu

Abundance (C%) = 9.25%

Average atomic mass of Neon =.?

The average atomic mass of Neon can be obtained as follow:

Average atomic mass = [(mass of A × A%)/100] + [(mass of B × B%)/100] + [(mass of C × C%)/100]

= [(19.9924356 × 90.48)/100] + [(20.9938428 × 0.27) /100] + [(21.9913831 × 9.25) /100]

= 18.0891557 + 0.05668338 + 2.03420294

= 20.180042 amu

Therefore, the average atomic mass of Neon is 20.180042 amu

20.181 u

The average atomic mass of Ne is the weighted average of the atomic masses of its isotopes.

We multiply the atomic mass of each isotope by a number representing its relative importance (i.e., its % abundance).

Thus,

Avg. at. mass

= (0.904 83× 19.992 u) + (0.002 71 × 20.994) + (0.092 53× 21.991 u)

= 18.0894 u + 0.0569 u + 2.0348 u = 20.181 u

average atomic mass = 20.29185 amu

Explanation:

given data

neon atom = 200

170 atom = 20(19.992 amu)

30 atom = 22(21.991 amu)

to find out

average atomic mass

solution

we know that average atomic mass formula that is

average atomic mass = Σabundance(%) × exact mass 1

## Neon Protons Neutrons Electrons Mass Number

here we know that neon two major isotopes is Neon 20 , Neon 22

abundance 1 = 170 / 200

abundance 2 = 30 /200

exact mass 1 = 19.992 amu

exact mass 2 = 21.991 amu

so

average atomic mass = 170/200 × 19.992 + 30/200 × 21.991

average atomic mass = 20.29185 amu

Explanation:

m / z = 20 , 21 , 22

m / 1 = 20 , 21 , 22 m = 20 , 21 , 22 .

ratio of isotopes = 112 : 0.21 : 11.1

Average atomic mass = (112 x 20 + .21 x 21 + 11.1 x 22) / (112 + .21 + 11.1 )

= (2240 + 4.41 + 244.2) / 123.31

= 2488.61 / 123.31

= 20.18

The three isotopes of neon are Ne-20 with atomic mass 19.992 amu and % abundance 90.48%, Ne-21 with atomic mass 20.994 amu and % abundance 0.27% and Ne-22 with atomic mass 21.991 amu and % abundance 9.25%.

The average atomic mass of Ne can be calculated as follows:

M=M(Ne-20)×%(Ne-20)+M(Ne-21)×%(Ne-21)+M(Ne-22)×%(Ne-22)

On putting the values,

M=(19.992 amu)(0.9048)+(20.994 amu)(0.0027)+(21.991 amu)(0.0925)=20.180 amu ## Reverse Tn Lookup

Thus, average mass of neon is 20.180 amu

The average atomic mass of Neon would simply be the sum of the weighted average of each isotope. That is:
average atomic mass = 0.905 * 20 + 0.003 * 21 + 0.092 * 22
average atomic mass = 20.187 amu
The element neon consists of 3 isotopes with masses 19.92, 20.99, and 21.99 amu. The relative abundance of these 3 isotopes are 90.92, 0.25, and 8.83 percent, respectively.
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