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प्रश्न
What are the periods in a periodic table?
उत्तर
“Horizontal rows from left to right in a periodic table are called periods.”
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संबंधित प्रश्न
Name the scientist who prepared modern periodic table.
On the basis of electronic configuration, how will you identify the first element of a period?
What are the groups in a periodic table? Give two characteristics of each.
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)
Define:- Periodic table
Give the symbol and valency of the following element and radical.
Oxygen [Oxide]
Explain structure of modern periodic table in short.
______ and ______ are called inner transition elements.
Define periods of modern periodic table.
What is the general name of the last elements of the Periodic Table?
