badge image

Enroll For Free Now & Improve Your Performance.

×
User Icon
User Icon
User Icon
User Icon
User Icon

Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Grade: 9

                        

name as many elements that can form both + and - ions with reasons pls!!!!!

9 years ago

Answers : (1)

vikas askiitian expert
509 Points
							

All atoms are composed of and equal number of protons (in the nucleus) and electrons (orbiting around the nucleus). Apart from Hydrogen atoms, all atoms also contain Neutrons in their nuclei. Neutrons have no electric charge. Protons have a positive electric charge:

P +

and electrons have a negative electric charge:

e -

This means that if an atom has equal numbers of protons and electrons it will have no overall charge. When an atom loses an electron it must have more protons than electrons so it will have an overall positive charge: these are all positive ions. You will find these elements in the first column of the periodic table, this is Group I.

H+ , Li+, Na+ , K+,Be2+,Mg2+,Al3+  etc

 

So now have a look at Group VII. Here we find some more easy ones. The elements in Group VII all form ions with a single negative charge. This is because they contain one more electron than protons. Just to make you life a little more interesting (or difficult) chemists change the name of the substance to indicate whether it is an atom or ion they are talking about so Fluorine atoms can be turned into Fluoride ions by gaining one electron. Fluorine --- Fluoride, Chlorine --- Chloride, Bromine --- Bromide, Iodine --- Iodide, Sulphur --- Sulphide.

F- , Cl- , Br- , I-  etc

               

 

   

 

9 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

  • 731 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 54 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details