Question

how to calculate atomic mass​

Answer 1

Answer:

For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number. This is because each proton and each neutron weigh one atomic mass unit (amu). By adding together the number of protons and neutrons and multiplying by 1 amu, you can calculate the mass of the atom.

Explanation:

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Answer 2

$\huge\sf{\underline{\underline{\orange{Atomic\: mass}}}}$

⇝ Atomic mass is the sum of the masses of protons, neutrons and electrons.

The formula for calculating the atomic mass :-

⇝ $\bf{Atomic mass}$ = Mass of protons + Mass of neutrons + Mass of electrons

☃️ $\sf{How\: to \: calculate\: atomic\: mass\: ?}$

★ There are three ways to calculate atomic mass.

1] By referring to the periodic table

⟹ In the periodic table digit of an atomic mass usually marked under the representation of an element.

↪ For example

Hydrogen (H) atomic mass - 1

Lithium (Li) atomic mass - 3

2] Addition Of Mass Of Protons and Neutrons

⟹ In an element atomic mass of an atom can be calculated by adding the mass of protons and neutrons

3] All Atoms of an Element – Weighted Average

⟹ The weighted average of the isotopes of each element grounded in nature by their abundance is the atomic weight of an element.

⟹ Each isotopes-abundance is multiplied by its mass.

⟹ If isotope abundance is present their solution should be divided by 100 and add these values.

⟹ The atomic mass unit can be related with the other mass unit by using the conversion factor.

$1u = 1.66054 × 10^-²⁴g$.

The atomic mass of some of the substance is given below :-

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Substance⠀⠀⠀⠀⠀⠀⠀⠀⠀Atomic mass

━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Calcium ion ⠀⠀⠀⠀⠀⠀⠀⠀⠀ 40.1

Chloride ion ⠀⠀⠀⠀⠀⠀⠀⠀⠀ 35.5

Magnesium ion⠀⠀⠀⠀⠀⠀⠀ 24.3

Potassium ion⠀⠀⠀⠀⠀⠀⠀⠀ 39.2

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