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प्रश्न
Name the scientist who stated the modern periodic law.
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उत्तर
Henry Moseley stated the modern periodic law.
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संबंधित प्रश्न
What is periodicity in properties of elements with reference to the Modern Periodic Table?
Consider the following elements:
20Ca, 8O, 18Ar, 16S, 4Be, 2He
Which of the above elements would you expect to be:
(i) very stable?
(ii) in group 2 of the periodic table?
(iii) in group 16 of the periodic table?
Name the type of elements which have outermost shell complete.
An element barium has the atomic number 56. Look up its position in the periodic table and answer the following question.
Is it larger or smaller than caesium (Cs)?
Give the symbol and valency of the following element and radical.
Hydrogen
State what the group number in the Modern Periodic Table signifies. Give a reason why elements in the same group, have similar valency and similar chemical properties.
Complete the following flow chart.
The arrangement of elements in the Modern Periodic Table is based on their ______.
The longest period of the Modern Periodic Table is period.
An element has 2 electrons in its N shell.
State its position in periodic table.
