Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Atomic number (Z) is equal to the charge of the atom, hence it is equal to the number of protons. Also, in a neutral species, number of proton is equal to the number of electron.
On the other hand, mass number (A) is equal to the sum of number of proton and number of neutron present within an atomic nucleus.
By looking in to the atoms , we can say the atomic number using the periodic table. And , by adding the number of proton and given number of neutrons we can find the mass number.
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