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प्रश्न
Name the metals in the first twenty elements.
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उत्तर
Li, Be, Na, Mg, Al, K and Ca.
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संबंधित प्रश्न
What is the major characteristic of the first elements in the periods of the periodic table? What is the general name of such elements?
What are the periods in a periodic table? Give two characteristics of each.
The atomic numbers of the three elements X, Y and Z are 2, 6 and 10 respectively.
(i) Which two elements belong to the same group?
(ii) Which two elements belong to the same period?
Give reasons for your choice.
The elements A, B, C and D belong to groups 1, 2, 14 and 17 respectively of the periodic table. Which of the following pairs of elements would produce a covalent bond?
(i) A and D
(ii) C and D
(iii) A and B
(iv) B and C
(v) A and C
From the standpoint of atomic structure, what determines which elements will be the first and which the last in a period of the periodic table?
Give the symbol and valency of the following element and radical.
Sulphur [Sulphide]
p-block is composed of groups 1 and 2.
Complete the following flow chart.
Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table?
Which one of the following elements exhibit maximum number of valence electrons?
