Dr. S P Jauhar and R Jauhar Solutions for Chapter: Periodic Classification Of Elements, Exercise 2: TEST YOURSELF
Dr. S P Jauhar Chemistry Solutions for Exercise - Dr. S P Jauhar and R Jauhar Solutions for Chapter: Periodic Classification Of Elements, Exercise 2: TEST YOURSELF
Attempt the practice questions on Chapter 5: Periodic Classification Of Elements, Exercise 2: TEST YOURSELF with hints and solutions to strengthen your understanding. MODERN'S ABC+ OF SCIENCE CHEMISTRY solutions are prepared by Experienced Embibe Experts.
Questions from Dr. S P Jauhar and R Jauhar Solutions for Chapter: Periodic Classification Of Elements, Exercise 2: TEST YOURSELF with Hints & Solutions
How many elements are present in periods and ?
Name the scientist who classified the elements in triads. (Johann Dobereiner/ Newlands/ Mendeleev)
Out of and , which has the smallest size?
Name two other elements which belong to the carbon family.
Name two other elements which belong to the sodium family.
Name two other elements which belong to the magnesium family.
Mendeleev predicted the existence of certain elements not known at that time and named two of them as eka-silicon and eka-aluminium.
(a) Name the elements which have taken the place of these elements.
(b) Mention the group and the period of these elements in the modern periodic table.
(c) How many valence electrons are present in each one of them?
The following table shows the position of six elements A, B, C, D, E and F in the periodic table:
| Groups/Periods | 1 | 2 | 3 to 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 2 | A | B | C | ||||||
| 3 | D | E | F |
Using the above table to answer the following questions :
(a) Which element will form only covalent compounds?(b) Which element is a metal with valency 2?
(c) Which element is a non-metal with valency of 3?
(d) Out of D and E, which one has a bigger atomic radius and why?
(e) Write a common name for the family of elements C and F.
