An element A has 2 electrons in its fourth shell.State:
(a) its atomic number
(b) its electronic configuration
(c) its valency
(d) position in the periodic table
(e) is it a metal or non-metal
(f) is it an oxidising or reducing agent.
A) Z=20 b) 1s2,2s2,2p6,3s2,3p6,4s2 c) 2 d) Fourth period in the second group of the Periodic Table e) It is a metal (Alkali earth metal)
f). It is a reducing agent
An element 'M' has atomic number 12.
(a) Write its electronic configuration.
(b) State the group to which 'M' belongs.
(c) Is 'M' a metal or a non-metal.
(d) Write the formula of its chloride.
Write electronic configuration of element 3517 T.
(a) What is the group number of T?
(b) What is the period number of T?
(c) How many valence electrons are there in an atom of T?
(d) What is the valency of T?
(e) Is it a metal or a non-metal?
(f) State number of protons and neutrons in T.
The electronic configuration of an element X is 2,8,6.
i. What is the number of valence electron in an atom of X?
ii. Is it a metal or a non-metal?