What are the first 20 element in periodic table?
First 20 Elements
| Atomic Number | Element | Symbol |
|---|---|---|
| 17 | Chlorine | Cl |
| 18 | Argon | Ar |
| 19 | Potassium | K |
| 20 | Calcium | Ca |
How can I remember the first 20 elements of the periodic table?
Happy Henry Lives Beside Boron Cottage, Near Our Friend Nelly Nancy MgAllen. Silly Patrick Stays Close….
- hydrogen H.
- helium He.
- lithium Li.
- beryllium Be.
- boron B.
- carbon C.
- nitrogen N.
- oxygen O.
How many elements can you name?
There are 118 named elements in the Periodic Table. How many can you guess?…Elements of the Periodic Table Quiz.
| # | Element |
|---|---|
| 115 | Moscovium |
| 116 | Livermorium |
| 117 | Tennessine |
| 118 | Oganesson |
What are the uses of the first 20 elements of the periodic table?
Terms in this set (20)
- Hydrogen. water.
- Helium. ballons.
- Lithium. batteries.
- Beryllium. nuclear reactor.
- Boron. heat restitant materials.
- Carbon. photosynthesis.
- Nitrogen. cooling.
- Oxygen. respiration.
What are the Valency of first 20 elements?
The Valency of First 20 Elements
| Element | Symbol | Valency |
|---|---|---|
| Carbon | C | 4 |
| Nitrogen | N | 3 |
| Oxygen | O | 2 |
| Fluorine | F | 1 |
What is the electronic configuration of the first 20 elements?
The electronic configuration of first 30 elements with atomic numbers listed above corresponds to the ground state of the specific elements….Electronic Configuration of First 30 Elements with Atomic Numbers.
| Atomic Number | Name of the Element | Electronic Configuration |
|---|---|---|
| 18 | Argon (Ar) | [Ne] 3s2 3p6 |
| 19 | Potassium (K) | [Ar] 4s1 |
| 20 | Calcium (Ca) | [Ar] 4s2 |
| 21 | Scandium (Sc) | [Ar] 3d1 4s2 |
What are 20 elements on the periodic table?
The elements of the periodic table sorted by atomic number
| Atomic number | Name chemical element | Symbol |
|---|---|---|
| 17 | Chlorine | Cl |
| 18 | Argon | Ar |
| 19 | Potassium | K |
| 20 | Calcium | Ca |