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प्रश्न
Name two elements in halogens.
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उत्तर
Chlorine and bromine.
संबंधित प्रश्न
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same period of the periodic table?
What is the number of valence electrons in the atoms of first elements in a period?
Correct the statement.
Transition elements are placed at extreme right of the periodic table.
Name two elements in Alkaline earth metals.
Fill in the blank:
The horizontal rows in the periodic table are called _____________.
State what is meant by the term chemical formula.
Give the chemical formula of carbonic acid
Write scientific reason.
There was ambiguity about the correct position of hydrogen in Mendeleev’s periodic table.
The element which has the least tendency to lose electrons is ______
Three elements A, B and C have 3, 4 and 2 electrons respectively in their outermost shell. Give the group number to which they belong in the Modern Periodic Table. Also, give their valencies.
