Question

Give the symbols of the elements from atomic number 1 -20 with atomic and mass number.

Answer 1

Atomic symbols:

1. Atomic symbols are the abbreviated form of name of the elements.
2. Some of the symbols are derived from the Latin names of the elements and most of them are exact same as the elements.

Explanation:

Atomic number	Element	Atomic symbol	Mass number
$1$	Hydrogen	$\mathrm{H}$	$1$
$2$	Helium	$\mathrm{He}$	$4$
$3$	Lithium	$\mathrm{Li}$	$7$
$4$	Beryllium	$\mathrm{Be}$	$9$
$5$	Boron	$\mathrm{B}$	$11$
$6$	Carbon	$\mathrm{C}$	$12$
$7$	Nitrogen	$\mathrm{N}$	$14$
$8$	Oxygen	$\mathrm{O}$	$16$
$9$	Fluorine	$\mathrm{F}$	$19$
$10$	Neon	$\mathrm{Ne}$	$20$
$11$	Sodium	$\mathrm{Na}$	$23$
$12$	Magnesium	$\mathrm{Mg}$	$24$
$13$	Aluminium	$\mathrm{Al}$	$27$
$14$	Silicon	$\mathrm{Si}$	$28$
$15$	Phosphorous	$\mathrm{P}$	$31$
$16$	Sulfur	$\mathrm{S}$	$32$
$17$	Chlorine	$\mathrm{Cl}$	$35$
$18$	Argon	$\mathrm{Ar}$	$40$
$19$	Potassium	$\mathrm{K}$	$39$
$20$	Calcium	$\mathrm{Ca}$	$40$