Mass Number Calculator

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Structure of Atom

Bohr's Atomic Model

Compton Effect

De Broglie Hypothesis

Distance of Closest Approach

Heisenberg's Uncertainty Principle

Important Formulas on Bohr's Atomic Model

Photo Electric Effect

Planck Quantum Theory

Rutherford Scattering

Schrodinger Wave Equation

Sommerfeld Model

✖The Number of Protons is the total number of positive subatomic particles found in the nucleus.ⓘ Number of Protons [p⁺]			+10% -10%
✖The number of neutrons is the total number of neutral subatomic particles found in the nucleus.ⓘ Number of Neutrons [n⁰]			+10% -10%

✖Mass Number is the sum of protons and neutrons in an atom of an element.ⓘ Mass Number [A]

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Formula

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Mass Number

Formula

`"A" = "p"^{"+"}+"n"^{"0"}`

Example

`"17"="11"+"6"`

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Mass Number Solution

STEP 0: Pre-Calculation Summary

Formula Used

Mass Number = Number of Protons+Number of Neutrons
A = p⁺+n⁰
This formula uses 3 Variables

Variables Used

Mass Number - Mass Number is the sum of protons and neutrons in an atom of an element.
Number of Protons - The Number of Protons is the total number of positive subatomic particles found in the nucleus.
Number of Neutrons - The number of neutrons is the total number of neutral subatomic particles found in the nucleus.

STEP 1: Convert Input(s) to Base Unit

Number of Protons: 11 --> No Conversion Required
Number of Neutrons: 6 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

A = p⁺+n⁰ --> 11+6

Evaluating ... ...

A = 17

STEP 3: Convert Result to Output's Unit

17 --> No Conversion Required

FINAL ANSWER

17 <-- Mass Number

(Calculation completed in 00.020 seconds)

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Created by Akshada Kulkarni

National Institute of Information Technology (NIIT), Neemrana

Akshada Kulkarni has created this Calculator and 500+ more calculators!

Verified by Suman Ray Pramanik

Indian Institute of Technology (IIT), Kanpur

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< 25 Structure of Atom Calculators

Bragg equation for Wavelength of Atoms in Crystal Lattice

Go Wavelength of X-ray = 2*Interplanar Spacing of Crystal*(sin(Bragg's Angle of Crystal))/Order of Diffraction

Bragg Equation for Distance between Planes of Atoms in Crystal Lattice

Go Interplanar Spacing in nm = (Order of Diffraction*Wavelength of X-ray)/(2*sin(Bragg's Angle of Crystal))

Bragg Equation for Order of Diffraction of Atoms in Crystal Lattice

Go Order of Diffraction = (2*Interplanar Spacing in nm*sin(Bragg's Angle of Crystal))/Wavelength of X-ray

Mass of Moving Electron

Go Mass of Moving Electron = Rest Mass of Electron/sqrt(1-((Velocity of Electron/[c])^2))

Electrostatic Force between Nucleus and Electron

Go Force between n and e = ([Coulomb]*Atomic Number*([Charge-e]^2))/(Radius of Orbit^2)

Energy of Stationary States

Go Energy of Stationary States = [Rydberg]*((Atomic Number^2)/(Quantum Number^2))

Radii of Stationary States

Go Radii of Stationary States = [Bohr-r]*((Quantum Number^2)/Atomic Number)

Radius of Orbit given Time Period of Electron

Go Radius of Orbit = (Time Period of Electron*Velocity of Electron)/(2*pi)

Time Period of Revolution of Electron

Go Time Period of Electron = (2*pi*Radius of Orbit)/Velocity of Electron

Orbital Frequency given Velocity of Electron

Go Frequency using Energy = Velocity of Electron/(2*pi*Radius of Orbit)

Total Energy in Electron Volts

Go Kinetic Energy of Photon = (6.8/(6.241506363094*10^(18)))*(Atomic Number)^2/(Quantum Number)^2

Energy in Electron Volts

Go Kinetic Energy of Photon = (6.8/(6.241506363094*10^(18)))*(Atomic Number)^2/(Quantum Number)^2

Kinetic Energy in Electron Volts

Go Energy of an Atom = -(13.6/(6.241506363094*10^(18)))*(Atomic Number)^2/(Quantum Number)^2

Radius of Orbit given Potential Energy of Electron

Go Radius of Orbit = (-(Atomic Number*([Charge-e]^2))/Potential Energy of Electron)

Energy of Electron

Go Kinetic Energy of Photon = 1.085*10^-18*(Atomic Number)^2/(Quantum Number)^2

Wave Number of Moving Particle

Go Wave Number = Energy of Atom/([hP]*[c])

Kinetic Energy of Electron

Go Energy of Atom = -2.178*10^(-18)*(Atomic Number)^2/(Quantum Number)^2

Radius of Orbit given Total Energy of Electron

Go Radius of Orbit = (-(Atomic Number*([Charge-e]^2))/(2*Total Energy))

Radius of Orbit given Kinetic Energy of Electron

Go Radius of Orbit = (Atomic Number*([Charge-e]^2))/(2*Kinetic Energy)

Angular Velocity of Electron

Go Angular Velocity Electron = Velocity of Electron/Radius of Orbit

Mass Number

Go Mass Number = Number of Protons+Number of Neutrons

Electric Charge

Go Electric Charge = Number of Electron*[Charge-e]

Number of Neutrons

Go Number of Neutrons = Mass Number-Atomic Number

Specific Charge

Go Specific Charge = Charge/[Mass-e]

Wave Number of Electromagnetic Wave

Go Wave Number = 1/Wavelength of Light Wave

Mass Number Formula

Mass Number = Number of Protons+Number of Neutrons
A = p⁺+n⁰

What is mass number of an atom?

The sum of the total number of electrons and protons in an atom is called the mass number of the atom. It is denoted as A. Mass number is always a whole number. A neutral atom contains an equal number of electrons and protons.

How to Calculate Mass Number?

Mass Number calculator uses Mass Number = Number of Protons+Number of Neutrons to calculate the Mass Number, The Mass number is the sum of the number of protons and neutrons in an atom of an element. It is also called a nucleon number. Mass Number is denoted by A symbol.

How to calculate Mass Number using this online calculator? To use this online calculator for Mass Number, enter Number of Protons (p⁺) & Number of Neutrons (n⁰) and hit the calculate button. Here is how the Mass Number calculation can be explained with given input values -> 17 = 11+6.

FAQ

What is Mass Number?

The Mass number is the sum of the number of protons and neutrons in an atom of an element. It is also called a nucleon number and is represented as A = p⁺+n⁰ or Mass Number = Number of Protons+Number of Neutrons. The Number of Protons is the total number of positive subatomic particles found in the nucleus & The number of neutrons is the total number of neutral subatomic particles found in the nucleus.

How to calculate Mass Number?

The Mass number is the sum of the number of protons and neutrons in an atom of an element. It is also called a nucleon number is calculated using Mass Number = Number of Protons+Number of Neutrons. To calculate Mass Number, you need Number of Protons (p⁺) & Number of Neutrons (n⁰). With our tool, you need to enter the respective value for Number of Protons & Number of Neutrons and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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