Why is atomic number called "Z"? Why is mass number called "A"?

Asked by Last Modified  

3 Answers

Follow 0
Answer

Please enter your answer

Dr. Jayasimha

Teaching professional with 20 years of experience in teaching Chemistry

"Atomic number" in German is "Atomzahl", so the Z symbol for atomic number probably comes from "Zahl" (number). In modern physics Z represents the greatest energy, nuclear power, in its potential form, nuclear charge."M is sometimes used for mass number ("Massenzahl" in German), but A is the symbol recommended...
read more
"Atomic number" in German is "Atomzahl", so the Z symbol for atomic number probably comes from "Zahl" (number). In modern physics Z represents the greatest energy, nuclear power, in its potential form, nuclear charge."M is sometimes used for mass number ("Massenzahl" in German), but A is the symbol recommended in the ACS Style GuideThe symbol may have been chosen so that the positions of the mass and atomic numbers are less likely to be confused in a nuclide symbol: A Z X read less
Comments
Dislike Bookmark

Index and bases so
Comments
Dislike Bookmark

"Atomic number" in German is "Atomzahl", so the Z symbol for atomic number probably comes from "Zahl" (number).
Comments
Dislike Bookmark

View 1 more Answers

Related Questions

1.Candidates must have studied Physics,Mathematics as compulsory subjects They must have studied any one of the subjects as optional subjects (Chemistry, Bio-technology, Computer Science, Biology) They must have secured a minimum of 50% marks in total including all subjects 2. Date of Birth: Candidates must be born on or after October 1, 1990 to be considered for the JEE Main 2015. SC/ST/PwD Candidates will have a relaxation of the upper age limit by 5 years. SC/ST/PwD Candidates must be born on or after October 1, 1985. Note: Date of Birth as mentioned in the Secondary Education Board/University certificate will be taken as the correct one
They must have studied any one of the subjects as optional subjects (Chemistry, Bio-technology, Computer Science, Biology) They must have secured
Manibhushan Kumar
What is the full form JEE?
Its very simple- Joint Entrance Examination.
Yadavendra
how should i prepare for iit. i am in class 11 cbse
First of all see the syllabus and start preparing accordingly. Your first step should be to read the ncert books. Especially for physics and chemistry.
Vinay
Is it very necessary to go for coaching classes for case class 12?
It's not necessarily , if you are thorough with the concept. Moreover you need to find time to solve problems and practice model papers.
D
0 0
5
Which Coaching Institute provides best study Material for Mathematics of class 12?
IIT Junction in Wakad Pune will get you the best material for your preperation
Y
0 0
8

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Innequalities basics part 4

Rajan Mittal

0 0
0
Calculate The Potential V And The Unknown Capacitance C
A capacitor of unknown capacitance is connected across a battery of V volts. The charge stored in it is 360 pC. When potential across the capacitor is reduced by 120 V the charge stored in it becomes 120...

Sujoy Das

2 0
0
Find The Displacement Of The Particle When Its Velocity Is Zero
Question: The displacement of a particle moving in one dimension under the action of a constant force is related to the time t by the equation t = square root of x + 3, where x is in metre and t is...

Sujoy Das

2 0
0
15 Easy Tips to solve MCQs in IIT JEEs
As we know, JEE is the toughest entrance test in India. But how many of you know the tricks to mark correct answers for MCQs in JEE Main and JEE Advanced? I know a few. In JEE, all questions are objective....

Akhil Goyal

0 0
0
Useful Collision Concepts Two dimensional Collision
We should note the following concepts when solving a Two-Body Collision Numerical:-Distance Between the centres of two Bodies -"b."When we have two objects colliding with each other, we assume both are...

Physics Institute

0 0
0

Recommended Articles

Importance of IIT JEE Crash Course and Success...

In conversation with Mr. Radhakrishnan K, Head of School Marketing, T.I.M.E., Chennai, on the importance and benefits of taking up IIT JEE Crash Course. He also shared few valuable IIT JEE tips and strategies for standing a better chance at the engineering entrance exam. About T.I.M.E., Chennai: Triumphant Institute...

Read full article >

JEE Exam: Preparation Tips for Mathematics Paper

JEE (previously known as IIT JEE) is an engineering entrance exam conducted by Central Board of Secondary Education. To crack the JEE exam, students need to focus equally in all the three subjects -- Physics, Chemistry and Mathematics. One of the most critical and dreaded subjects in the JEE Syllabus is the Mathematics...

Read full article >

The IIT Dream: Ways to Make it True

The students who dream or make into IITs can be categorized into two -- Some planning at a very early stage and some starting at a much later stage after their first Board/Public exam. The difference may not be pronounced but the early starters have a slight edge over the latter. The competition for the elite IITs...

Read full article >

IIT Foundation Course: Five Joining Benefits

Do you want to become an Engineer? If your answer is YES, then plan your career right from an early age. To reach your ultimate goal, you need to take right actions at the right time, to increase your chances of success. Make your dream of becoming an IITian true in future, by taking up the right course at the right age....

Read full article >

Find IIT JEE Coaching near you
IIT JEE Coaching in Delhi
IIT JEE Coaching in Mumbai
IIT JEE Coaching in Bangalore
IIT JEE Coaching in Hyderabad
IIT JEE Coaching in Kolkata
IIT JEE Coaching in Chennai
IIT JEE Coaching in Pune
IIT JEE Coaching in Lucknow
IIT JEE Coaching in Gurgaon
IIT JEE Coaching in Jaipur
Online IIT JEE Coaching

Looking for IIT JEE Coaching ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you