Determine atomic number and neutrons of an element, Chemistry

Assignment Help:

An element have atomic weight 40 and it's electronic configuration is 1s2, 2s2, 2p6, 3s2, 3p6. Then its atomic number and number of neutrons will be:

(1) 18 and 22      

(2) 22 and 18       

(3) 26 and 20      

(4) 40 and 18

Ans: (a)18 and 22

 


Related Discussions:- Determine atomic number and neutrons of an element

What are termed as f-block elements?, The f-block elements contains of two ...

The f-block elements contains of two series of inner transition elements i.e. lanthanoids (the fourteen elements subsequent lanthanum) and actinoids (the fourteen elements subseque

S block elements, why lithium and beryllium markedly differ from other memb...

why lithium and beryllium markedly differ from other members of their respective groups?

DTA, interpretation ande of errors in differential thermal analysis

interpretation ande of errors in differential thermal analysis

Separation techniquics using solute and solvent, suppose n mmol of solute A...

suppose n mmol of solute A in Vaq ml of aqueous solution is extracted with Vorg ml of animmiscible organic solvent. at equilibrium n1 mmol of A will remain in the aqueous layer and

Calculate the enthalpy of a system, Q. Define Enthalpy and Calculate the En...

Q. Define Enthalpy and Calculate the Enthalpy of a system? Ans. Enthalpy is a measure of the total energy content of a system.  It is represented by a big H. Change in ent

Higher fatty acids - carboxylic acids, Higher fatty acids - Carboxylic acid...

Higher fatty acids - Carboxylic acids Stearic, Palmitic, and oleic acids are found in natural fats and oils like glyceryl esters. Higher fatty acids derived their names from

Assignments, I have 4 assignments for unit 22 chemistry btec level. Are you...

I have 4 assignments for unit 22 chemistry btec level. Are you able to do my assignments by friday?

Electrochemistry, Q. Describe Electrochemistry Electricity (i.e., elect...

Q. Describe Electrochemistry Electricity (i.e., electric current) is a flow of electric charges. In metals, it is the flow of electrons. In electrolytes, it is the mov

Antifertility, how can they used and what its side effects?

how can they used and what its side effects?

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