What are the First Twenty Elements?
The first twenty elements in the periodic table are as follows: Hydrogen (H), Helium (He), Lithium (Li), Beryllium (Be), Boron (B), Carbon (C), Nitrogen (N), Oxygen (O), Fluorine (F), Neon (Ne), Sodium (Na), Magnesium (Mg), Aluminum (Al), Silicon (Si), Phosphorus (P), Sulfur (S), Chlorine (Cl), Argon (Ar), Potassium (K), Calcium (Ca). Let’s discuss the elements listed above in detail.
Table for First 20 Elements
The first 20 elements are tabulated in increasing order of their atomic number along with their symbols and atomic masses:
Atomic number |
Names of elements |
Symbols |
Atomic masses |
---|---|---|---|
1 |
H |
1.008 |
|
2 |
Helium |
He |
4.0026 |
3 |
Lithium |
Li |
6.94 |
4 |
Beryllium |
Be |
9.0122 |
5 |
Boron |
B |
10.81 |
6 |
Carbon |
C |
12.011 |
7 |
N |
14.007 |
|
8 |
O |
15.999 |
|
9 |
Fluorine |
F |
18.998 |
10 |
Neon |
Ne |
20.18 |
11 |
Sodium |
Na |
22.99 |
12 |
Magnesium |
Mg |
24.305 |
13 |
Aluminum |
Al |
26.982 |
14 |
Si |
28.085 |
|
15 |
P |
30.974 |
|
16 |
Sulphur |
S |
32.06 |
17 |
Chlorine |
Cl |
35.45 |
18 |
Argon |
Ar |
39.948 |
19 |
Potassium |
K |
39.098 |
20 |
Calcium |
Ca |
40.078 |
First 20 Elements of Periodic Table – Name and Symbols
Elements are the purest form of matter which has only one type of atoms. There are total 118 elements found till date. These elements are arranged in a tabular form in increasing order of atomic number such that elements with common properties are arranged together. This tabular arrangement of elements is called Periodic Table of Elements. In this article, we will learn first twenty elements with atomic number 1 to 20 along with their properties.