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Non-metals in the third period ....

Non-metals in the third period .

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Name the following: The three metals in the third period of the modern periodic table.

Answer the following questions: The elements in the third period , namely, Na, Mg,Al,Si,P,S,Cl and Ar have electrons in the three shells, K,L,M . Write down the electronic configuration of these elements.

Write the atomic number.of the element in the third period and seventeenth group of the periodic table.

Classify the elements of the third period into metals and non-metals.

State whether the following statements are True or False: The zig-zag line seprates the metals from nonmetals in the periodic table i.e. metals are on the left side and nommetals are on the right side.

Answer the following questions: What do you think? Should hydrogen be placed in the group 17of halogens or group 1 of alkali metals in the modern periodic table?

Answer the following questions: How many elements are there in the second and the third periods of the periodic table ?

Name the following: An alkali metal in the period 2.

Name the following: An alkaline earth metal in the period 3.

Give scientific reasons : The third period contains only eight elements even though the electorn capacity of the third shell is 18.