Chemistry
What do you understand by ?
(i) Periodicity
(ii) Typical elements
(iii) Orbits
Periodic Table
189 Likes
Answer
(i) The properties that reappear at regular intervals, or in which there is gradual variation (i.e. increase or decrease) at regular intervals, are called 'periodic properties' and the phenomenon is known as the periodicity of elements.
(ii) The third period elements are typical elements. They are Sodium (Na), Magnesium (Mg), Aluminium (Al), Silicon (Si), Phosphorus (P), Sulphur (S), Chlorine (Cl) .
(iii) Electrons revolve around the nucleus in certain definite circular paths called orbits.
Answered By
126 Likes
Related Questions
Elements of group 1 and elements of group 17 both have valency 1. Explain.
Correct the statements.
(i) Elements in the same period have the same valency.
(ii) Valency depends upon the number of shells in an atom.
(iii) Copper and zinc are representative elements.
(iv) Transition elements are placed at extreme right of the periodic table.
Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice ?
Name the (i) metals (ii) metalloids and (iii) non-metals in the first twenty elements.