✖Mass Number is the sum of protons and neutrons in an atom of an element.ⓘ Mass Number [A]			+10% -10%
✖Atomic Number is the number of protons present inside the nucleus of an atom of an element.ⓘ Atomic Number [Z]			+10% -10%

✖The number of neutrons is the total number of neutral subatomic particles found in the nucleus.ⓘ Number of Neutrons [n⁰]

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Formula

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Number of Neutrons

Formula

`"n"^{"0"} = "A"-"Z"`

Example

`"20"="37"-"17"`

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Number of Neutrons Solution

STEP 0: Pre-Calculation Summary

Formula Used

Number of Neutrons = Mass Number-Atomic Number
n⁰ = A-Z
This formula uses 3 Variables

Variables Used

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

STEP 1: Convert Input(s) to Base Unit

Mass Number: 37 --> No Conversion Required
Atomic Number: 17 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

n⁰ = A-Z --> 37-17

Evaluating ... ...

n⁰ = 20

STEP 3: Convert Result to Output's Unit

20 --> No Conversion Required

FINAL ANSWER

20 <-- Number of Neutrons

(Calculation completed in 00.004 seconds)

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Created by Akshada Kulkarni

National Institute of Information Technology (NIIT), Neemrana

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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

Number of Neutrons Formula

Number of Neutrons = Mass Number-Atomic Number
n⁰ = A-Z

How do we get the number of neutrons?

The difference between the mass number(A) and the atomic number(Z) gives the number of neutrons (n) in a given nucleus: n = A − Z. In the case of a neutral atom, a neutral atom contains an equal number of electrons and protons The number of electrons in a neutral atom is equal to the number of protons.

How to Calculate Number of Neutrons?

Number of Neutrons calculator uses Number of Neutrons = Mass Number-Atomic Number to calculate the Number of Neutrons, The number of Neutrons is equal to the difference between the mass number of the atom (A) and the atomic number (Z). Number of Neutrons is denoted by n⁰ symbol.

How to calculate Number of Neutrons using this online calculator? To use this online calculator for Number of Neutrons, enter Mass Number (A) & Atomic Number (Z) and hit the calculate button. Here is how the Number of Neutrons calculation can be explained with given input values -> 20 = 37-17.

FAQ

What is Number of Neutrons?

The number of Neutrons is equal to the difference between the mass number of the atom (A) and the atomic number (Z) and is represented as n⁰ = A-Z or Number of Neutrons = Mass Number-Atomic Number. Mass Number is the sum of protons and neutrons in an atom of an element & Atomic Number is the number of protons present inside the nucleus of an atom of an element.

How to calculate Number of Neutrons?

The number of Neutrons is equal to the difference between the mass number of the atom (A) and the atomic number (Z) is calculated using Number of Neutrons = Mass Number-Atomic Number. To calculate Number of Neutrons, you need Mass Number (A) & Atomic Number (Z). With our tool, you need to enter the respective value for Mass Number & Atomic Number 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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