Which of the following is not a metal and is liquid at ambient temperature?
Phosphorous
Bromine
Chlorine
Helium
Correct option B
Bromine At room temperature, bromine is a non-metal that maintains a liquid form. The chemical element bromine has the symbol Br and atomic number 35.
It is a volatile reddish-brown liquid at ambient temperature and the third-lightest halogen.
Despite not being a metal, phosphorus is a solid at ambient temperature. While it is a non-metal-like chlorine, it is a gas at room temperature. At room temperature, helium is a noble gas and a gas.
Incorrect option A
Phosphorus
The non-metal with the atomic number 15 is phosphorus (P). White phosphorus and red phosphorus are the two main types of elemental phosphorus.
Incorrect option D
Helium
A chemical element with the atomic number two and the letter He is helium. It is the first member of the noble gas group in the periodic table and is a colourless, odourless, tasteless, inert, monatomic gas. The lowest melting and boiling points of any element are for this one.