Number of electrons and neutrons of an element & mass no, Chemistry

Assignment Help:

The number of electrons and neutrons of an element is 18 and 20 respectively. Its mass number is:

(1) 17             

(2) 37       

(3)2             

(4)38

Ans: 17

 


Related Discussions:- Number of electrons and neutrons of an element & mass no

Methods of showing concentrations of solutions, Methods of showing concentr...

Methods of showing concentrations of solutions The concentration of a solution can be provided in various ways. (A) Percent by mass (B) Molarity (C) molality (D) Mo

What is sublimation energy, The amount of energy needed to convert one mole...

The amount of energy needed to convert one mole of solid substance to vapor state is known as Sublimation energy

The electronic structure of four elements, The electronic structure of four...

The electronic structure of four elements A, B, C, D are: (1) 1s 2                   (2) 1s 2 , 2s 2, 2p 2 ,              (3)  1s 2, 2s 2 , 2p 5 ,

Origin and abundance of the elements, ORIGIN AND ABUNDANCE OF THE ELEMENTS ...

ORIGIN AND ABUNDANCE OF THE ELEMENTS The synthesis of elements needs nuclear reactions, of which the most important type is the fusion of two light nuclei to prepare one of

Find the equilibrium extent of reaction, The gas stream from a sulfur burne...

The gas stream from a sulfur burner is composed of 15-mol% SO 2 , 20-mol% O 2 , and 65-mol% N 2 .  This gas stream at 1 bar and 680°C enters a catalytic converter, where the SO 2

Lewis acids and bases-polymerization, Polymerization The tendency of ma...

Polymerization The tendency of many molecules to aggregate and form dimmers (e.g. Al2Cl6 2), extended polymeric, or larger oligomers structures can be regarded as a donor-accep

Glucose, Why can''t glucose exist as a gas? What properties make this so?

Why can''t glucose exist as a gas? What properties make this so?

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