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प्रश्न
Name the metalloids in the first twenty elements.
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उत्तर
B (Boron), Si (Silicon).
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संबंधित प्रश्न
Fill in the following blank with suitable word:
Group 18 elements are called ...............
How were the positions of isotopes of an element decided in the modern periodic table?
On which side of the periodic table will you find non-metals?
What is the name of those elements which divide metals and non-metals in the periodic table?
Which of the following statement is correct in regard to the classification of elements?
(a) Elements in modern periodic table are arranged on the basis of increasing atomic masses.
(b) Elements in Mendeleev's periodic table are arranged on the basis of increasing atomic numbers.
(c) In modern periodic table, the element nickel of lower atomic mass is kept before the element cobalt of higher atomic mass.
(d) In modern periodic table, the isotopes of chlorine having different atomic masses are kept in the same group.
State the term
The tabular arrangement of elements in horizontal rows and vertical columns _________
Give the symbol and valency of the following element and radical.
Zinc
Name the following:
The group of the Modern Periodic Table to which calcium [Ca2+] belongs.
Distinguish between:
s-block - p-block
State whether true or false. If false, correct the statement.
Lanthanides and actinides are kept at the bottom of the periodic table because they resemble each other but they do not resemble with any other group elements.
