Question 1 :
An element A have 3 electrons in its outermost shell. Find its valency.
Question 2 :
An element B have 4 electrons in its outermost shell. Find its valency.
Question 3 :
Mendeleev predicted the existence of certain elements not known at that time and named it as Eka-silicon. What is the period of this element in the modern periodic table?
Question 4 :
Arrange the following elements in the order of their increasing nonmetallic character
Li, O, C, Be, F
Question 5 :
In Mendeleev's Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the perioidc table later
Question 6 :
Arrange the following metals in increasing order of their reactivity.
Na, K, Ca, Hg
Question 7 :
Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements?
Question 8 :
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In the above table, the position of three elements A, B and C in the periodic table is shown, will C be larger or smaller in size than B?
Question 9 :
Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?
Question 10 :
Arrange the following elements in the increasing order of their metallic character: Mg, Ca, K, Ge, Ga
Question 11 :
Determine the valency of the element whose atomic number is 10.
Question 12 :
Identify the period number of the element whose atomic number is 7.
Question 13 :
Identify and name the element whose electronic configuration is 2, 1
Question 14 :
Where would you locate an element which is an inert gas with atomic number 2, in the periodic table?
Question 15 :
Identify the period number of the element whose atomic number is 20.
Question 16 :
An element A have 3 electrons in its outermost shell. Give the group number to which it belong in Modern Periodic Table.
Question 17 :
Which element has a total of three shells, with four electrons in its valence shell?
Question 18 :
Where would you locate an element with variable (more than one) valency stored under water, in the periodic table?
Question 19 :
Identify and name the element whose electronic configuration is 2, 8, 2
Question 20 :
Which of the following statements about the Modern Periodic Table is correct: