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प्रश्न
Name two elements in halogens.
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उत्तर
Chlorine and bromine.
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संबंधित प्रश्न
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
Which of the following statement about the modern periodic table is correct?
(a) It has 18 horizontal rows known as periods.
(b) It has 7 vertical columns known as periods.
(c) It has 18 vertical columns known as groups.
(d) It has 7 horizontal rows known as groups.
What is the number of elements is 1st period the modern periodic table?
State its position in the periodic table?
Give the symbol and valency of the following element and radical.
Sulphite
Complete the following flow chart.
Select the appropriate options and complete the following paragraph:
(metals, non-metals, metalloids, four, seven, s-block, p-block, d-block, f-block).
On the basis of electronic configuration, elements in the modern periodic table are classified Into ______ blocks. Groups 1 and 2 elements are included in ______ and all these elements are metals. (except Hydrogen). Group 13 to 18 elements are included in ______. This block contains metals, non-metals and metalloids. Group 3 to 12 elements are included in ______ and all the elements are ______ elements shown at the bottom of the periodic table i.e. Lanthanides and Actinides constitute ______ and all these elements are metals.
What is the general name of the last elements of the Periodic Table?
An element has 2 electrons in its N shell.
State its position in periodic table.
Match the atomic number with the following:
A rare gas.
