How many first 20 elements are there in the periodic table?

First 20 Elements

What are 20 elements on the periodic table?

The elements of the periodic table sorted by atomic number

Are there 20 non-metals?

Essential for life (carbon, hydrogen, nitrogen, oxygen, sulfur, chlorine, phosphorus) Fertilizers (hydrogen, nitrogen, phosphorus, sulfur, chlorine, selenium) Refrigerants and cryogenics (hydrogen, helium, nitrogen, oxygen, fluorine, neon) Industrial acids (carbon, nitrogen, fluorine, phosphorus, sulfur, chlorine)

What are the first metals in the periodic table?

Group 1A — The Alkali Metals. Group 1A (or IA) of the periodic table are the alkali metals: hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).

How many of the first 20 elements are metals?

As you can see, Lithium, Beryllium, Sodium, Magnesium, Aluminum, Potassium, and Calcium are metals out of the first 20 elements. Hydrogen, Helium, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Phosphorus, Sulfur, Chlorine, and Argon, are non-metals within the first 20 elements.

Who discovered the first 20 elements of the periodic table?

Dimitri Mendeleev
In 1869 Russian chemist Dimitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass. He predicted the discovery of other elements, and left spaces open in his periodic table for them.

What are the twenty metals?

So the metals and non-metals are as follows: Metals in the first twenty elements are Lithium, Beryllium, Sodium, magnesium, Aluminum, Potassium, and calcium. Now the non-metals in the first twenty elements are Hydrogen, Helium, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Phosphorous, Sulphur, Chlorine, and Argon.

What are the uses of first 20 elements?