Villivakkam, Chennai, India - 600049
Verified 9 yrs of Exp 
32
Details verified of Rajkumar D✕
Identity
Education
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Class Location
Online (video chat via skype, google hangout etc)
Student's Home
Tutor's Home
Years of Experience in PSC Exam Coaching classes
9
PSC state
Tamil Nadu Public Service Commission (TNPSC)
Class Location
Online (video chat via skype, google hangout etc)
Student's Home
Tutor's Home
Years of Experience in Software Testing classes
1
Training for ISTQB certification
Yes
Testing Types
Automated Software Testing
Class Location
Online (video chat via skype, google hangout etc)
Student's Home
Tutor's Home
Years of Experience in UPSC Exams Coaching classes
10
Language of instruction offered
Tamil, English
Preferred class strength
Group Classes
Gives
Civil Services (Mains) Exam Coaching
Class Location
Online (video chat via skype, google hangout etc)
Student's Home
Tutor's Home
Years of Experience in Bank Clerical Exam Coaching classes
10
Target section catered to
Reasoning Ability, English, Quantitative aptitude/ Numerical ability, Computer aptitude, Interview prep, General awareness/ Financial awareness
5.0 out of 5 21 reviews
Balaji
"He is very kind and intelligent staff and his way of teaching is quite interesting and main point is his teaching is really understandable. "
Hari Prakash l
"He is the best in his field. His teaching attitude is awesome. Explanation will be on point.He deserves five star. "
Pavithran
"I learned Dynamics of machinery from Mr.Rajkumar sir and his teaching was extrodinary and the way of teaching was proffesional and easy to understand for even weak students.We love you sir and your teaching skills were remarkable. "
Kamal
"Teaching was Good , Easy to Understand and Very Useful. I would recommend to all. "
A.mobin
"Nice I have experienced lot. I have learend more in his method of teaching.It is clear to understand easily. "
Jerin
"Great Teacher. I have just started from a very basic understanding and Arash quickly adapts the level to meet yours, while at the same time demands your full focus and intensity to learn as much as possible during the lessons. Fantastic so far, would recommend to anyone. "
Answered on 27/08/2020 Learn CBSE - Class 11/Chemistry
If there is a difference between the number of protons and electrons in an atom, it is said to be an ion.
If the number of electrons is more than the number of protons, then the ion is negatively charged (anion), electrically.
If the number of electrons is lesser than the number of protons, then the ion is positively charged (cation), electrically.
Note: protons in the nucleus of an atom are stable. Only the electrons may vary. The atoms may lose or gain the electrons from its valence shell.
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Anna Nagar West, Chennai 
