Atomic mass units, Chemistry

Assignment Help:

Q. What is Atomic Mass Units?

Ans. Notice in the last column of the table, the masses of the subatomic particles are reported in atomic mass units. The actual masses of electrons, protons and neutrons are so small and, consequently, inconvenient to work with. Therefore, scientists have developed a relative scale to report mass units. In this scale, a unit of mass is called the atomic mass unit, or amu. An amu is approximately the mass of one proton or one neutron. Since the mass of an electron is so small relative to the masses of the proton and neutron, it is assigned an atomic mass of 0 amu.

According to the International Union of Pure and Applied Chemistry (IUPAC), the mass of carbon-12 is exactly 12 amu. All other atomic masses are based on this standard.


Related Discussions:- Atomic mass units

Freezing Point Lowering, The freezing point of ethylene glycol is -3.2 degr...

The freezing point of ethylene glycol is -3.2 degree-Celcius. How many grams of ethylene glycol is required in 150 L of water to achieve such temperature?

Freezing and Boiling points, Calculate the molarmass of a nonelectrolyte th...

Calculate the molarmass of a nonelectrolyte that lowers the freezing point of 25.00g of water to -3.9 degrees C when 4.27 g of the substance is dissolved in the water.

On the basis of application how are dyes classified, On the basis of applic...

On the basis of application, how are dyes classified? Describe essential features of any two of them.

Example on law of conservation of mass, Q. Example on Law of Conservation o...

Q. Example on Law of Conservation of Mass? A slim strip of iron with a mass of 15.72 g is placed in to a solution containing 21.12 g of copper and copper (II) sulphate begins t

Explain important properties of energy, Q. Explain important properties of ...

Q. Explain important properties of energy? Properties of Energy There are two important laws that explain the important properties of energy: Conservation of Energy (

what is aluminium?, It is Hydrated Potassium Aluminium Sulfate [ KAl(SO4)2...

It is Hydrated Potassium Aluminium Sulfate [ KAl(SO4)2·12H2O ].

Atoms, What would be the benefit of knowing where the electrons are at any ...

What would be the benefit of knowing where the electrons are at any time?

Alpha-particle scattering experiment proved that atom, Rutherford's α parti...

Rutherford's α particle scattering experiment proved that atom has: (1) Electrons (2 )Neutron (3) Nucleus    (4 )Orbitals Ans: Nucleus

Assignment, I have a very difficult chemistry online assignment due in and ...

I have a very difficult chemistry online assignment due in and I need help.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd