Which one of the following is metalloid?
Which one is not the fault of Mendeleev's periodic table.
Which one of the following is a very active element.
In which group and period does the element having electronic configuration 1s2 , 2s2 , 2p6 , 3s2 fall on the periodic table.
Which of the following is an example of alkali metal?
Study the part of periodic table given below and answer the question.
|I A||II A||IV A||V A||VI A||VII A||O|
Elements of which group have been kept on the table given alongside? What changes can be observed in the reactivity from top to bottom.
A part of periodic table is given.
As we move from left to right,
The farther we move down in periodic table, the larger the size of atom can be observed. What effect will it lay on the reactivity of elements? Clarify it.
What change in metallic property can be observed on moving from left to right in modern periodic table.
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