Q1 of 24 Page 5

State the modern periodic law of classification of elements. (CBSE 2014, 2013)

Elements in modern periodic table are classified into three parts metals, non-metals and metalloids.


Metals- Metals are those elements which donate electrons.


Ex- Na, K, Rb, Mg, Ca


Non-metals- Nono-metals are those elements which accept electrons.


Ex- N, O, F, Cl


Metalloids- Metalloids are those elements which show property of both metals and non-metals.


Ex- B, Si, Ge

More from this chapter

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2

By considering their position in the periodic table, which one of the following elements would you expect to have maximum metallic character ?

Ga, Ge, As, Se, Be. (CBSE 2005)

 3

What were the limitations of Dobereiner's classification of elements? (CBSE 2010)

 4

What is the basis of Mendeleev’s periodic table? (CBSE 2011)

 5

The atomic number of an element is 12. State whether its oxide is acidic or basic.
(CBSE 2012)