Chemistry
The atom of an element A has 6 electrons in its M shell.
(a) Write the electronic configuration of element A.
(b) What is the atomic number of element A?
(c) Is it a metal or a non-metal?
(d) What type of ion will be formed by an atom of element A? Write the symbol of the ion formed.
(e) What could element A be ?
(f) Draw the orbital structure of A and its ion.
Answer
(a) [2, 8, 6], as it has three shells — K, L, M.
(b) 16, as atomic number is the total number of electrons so, 2+8+6 = 16
(c) Non-metal, as it has 6 electrons in the valence shell and will accept 2 electrons to complete its octet.
(d) Anion, A2-, as element A has 6 valence electrons so it has a valency of -2 and it will take two electrons, complete its octet and become a negatively charged ion.
(e) Sulphur, as sulphur also has the electronic configuration of [2, 8, 6].
(f) Orbital structure of A and its ion is shown below:
Related Questions
With the help of a diagram, state the number of bonds and the type of bonds in:
(a) ethene molecule
(b) ethyne molecule
(a) Homolytic bond fission (or cleavage) takes place during the formation of a radical. Why is it named so?
(b) Give an example of radical formation.
(c) Comment on the reactivity of free radicals.
An atom of an element Y may be written as 94Y.
(a) What does the figure 9 indicate?
(b) What does the figure 4 indicate?
(c) What is the number of protons in atom Y?
(d) What is the number of neutrons in atom Y?
(e) What is the number of electrons in atom Y?
(f) How many electrons are there in the outermost shell of an atom of element Y?
(g) Write the symbol of ion formed by an atom of element Y?
Atom A is represented as 20982A, atom B as 20983B and atom C as 21182C
(a) How many electrons, protons and neutrons do A, B and C have?
(b) Which two atoms have the different number of nucleons?
(c) Name the term which can be used for A and C atoms.
(d) Define the term mentioned in part (c) above.