Now the non-metals in the first twenty elements are Hydrogen, Helium, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Phosphorous, Sulphur, Chlorine, and Argon.
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)
Seventeen elements are generally classified as nonmetals; most are gases (hydrogen, helium, nitrogen, oxygen, fluorine, neon, chlorine, argon, krypton, xenon and radon); one is a liquid (bromine); and a few are solids (carbon, phosphorus, sulfur, selenium, and iodine).
The fourteen elements effectively always recognized as nonmetals are hydrogen, oxygen nitrogen, and sulfur (4); the corrosive halogens fluorine, chlorine, bromine, and iodine (4); and the noble gases helium, neon, argon, krypton, xenon and radon (6).
The chemical element Calcium (Ca), atomic number 20, is the fifth element and the third most abundant metal in the earths crust. The metal is trimorphic, harder than sodium, but softer than aluminium.
Calcium (Ca) is an active metal and react with water at room temperature. Such metals are stored in kerosene. Calcium is an alkaline earth metal having atomic number 20.
Therefore, the answer is option (a) – Zinc is the metal which is brittle in nature.
. Non- metals are brittle (break easily). They are neither malleable nor ductile....02 Acid, Bases and Salt.MetalsNon-MetalsMetals usually do not combine with hydrogen. Only a few reactive metals combine with hydrogen to form ionic metal hydrides.Non- metals react with hydrogen to form stable, covalent hydrides.4 more rows
What is the first 20 element?
First 20 ElementsAtomic NumberElementSymbol17ChlorineCl18ArgonAr19PotassiumK20CalciumCa16 more rows