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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.
संबंधित प्रश्न
Write the merits of the modern periodic table over Mendeleev’s Periodic table
Give two example of group 17 elements.
Name the scientist who prepared modern periodic table.
Which of the following are the correct characteristics of isotopes of an element?
(i) same atomic mass
(ii) same atomic number
(iii) same physical properties
(iv) same chemical properties
(a) (i), (ii) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)
Give the symbol and valency of the following element and radical.
Potassium
Find the odd one out and give its explanation.
The modern periodic table shows the molecular masses of the elements in each frame.
State any five features of modern periodic table.
Which of the following elements will form an acidic oxide?
Name the non-metals in the first twenty elements.
