Atomic trend and symbols in Chemistry

Atomic Symbols

Deduce the number of protons, neutrons and electrons in the following species:

1.    11H

2.    178O

3.    42He2+

4.    13254Xe

5.   2713Al3+

6.   23592U

7.   11H+

8.   4521Sc3+

9.   3717Cl-

10. 146C

Use the periodic table to write symbols for the following species:

11. 19 protons, 20 neutrons, 18 electrons

12. 8 protons, 8 neutrons, 10 electrons

13. 1 proton, 2 neutrons, 1 electron

14. 82 protons, 126 neutrons, 80 electrons


15. 53 protons, 74 neutrons, 54 electrons

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