The average atomic mass of a sample of element X is 16.2 u. What are the percentages of isotopes 8 16 X and 8 18 X in the sample?

Let the percentage of 8 16 X be a and that of 8 18 X be 100 - a. 16.2u = + ⇒ 1620 = 16a + 1800 – 18a ⇒ 1620 = 1800 – 2a ⇒ 2a = 1800 - 1620 ⇒ a = ⇒ a = ⇒ a = 90 ∴ Percentage of 8 16 X = 90% and Percentage of 8 18 X = 100 - a = 100 - 90 = 10% Hence, the percentage of the isotope 8 16 X in the sample is 90% and that of 8 18 X is 10%

Na⁺ has completely filled K and L shells. Explain.

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If the bromine atom is available in the form of, say, two isotopes ₃₅⁷⁹Br (49.7%) and ₃₅⁸¹Br (50.3%), calculate the average atomic mass of bromine atom.

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If Z=3, what would be the valency of the element? Also, name the element.

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Composition of the nuclei of two atomic species, X and Y, are given as under
X Y
Protons = 6 6
Neutrons = 6 8
Give the mass numbers of X and Y. What is the relation between the two species?

	X	Y
Protons =	6	6
Neutrons =	6	8

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Science

The average atomic mass of a sample of element X is 16.2 u. What are the percentages of isotopes ₈¹⁶X and ₈¹⁸X in the sample?

Atomic Structure

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Na⁺ has completely filled K and L shells. Explain.

If the bromine atom is available in the form of, say, two isotopes ₃₅⁷⁹Br (49.7%) and ₃₅⁸¹Br (50.3%), calculate the average atomic mass of bromine atom.

If Z=3, what would be the valency of the element? Also, name the element.

Composition of the nuclei of two atomic species, X and Y, are given as under
X Y
Protons = 6 6
Neutrons = 6 8
Give the mass numbers of X and Y. What is the relation between the two species?

Science

The average atomic mass of a sample of element X is 16.2 u. What are the percentages of isotopes 816X and 818X in the sample?

Atomic Structure

Related Questions

Na+ has completely filled K and L shells. Explain.

If the bromine atom is available in the form of, say, two isotopes 3579Br (49.7%) and 3581Br (50.3%), calculate the average atomic mass of bromine atom.

If Z=3, what would be the valency of the element? Also, name the element.

Composition of the nuclei of two atomic species, X and Y, are given as under XYProtons =66Neutrons =68Give the mass numbers of X and Y. What is the relation between the two species?

The average atomic mass of a sample of element X is 16.2 u. What are the percentages of isotopes ₈¹⁶X and ₈¹⁸X in the sample?

Na⁺ has completely filled K and L shells. Explain.

If the bromine atom is available in the form of, say, two isotopes ₃₅⁷⁹Br (49.7%) and ₃₅⁸¹Br (50.3%), calculate the average atomic mass of bromine atom.

Composition of the nuclei of two atomic species, X and Y, are given as under
X Y
Protons = 6 6
Neutrons = 6 8
Give the mass numbers of X and Y. What is the relation between the two species?