Explain part a and b given here.
Answers
Answer A
a) Na atom is bigger because due to large positive charge on the nucleus, the electron are pulled in more close to the nucleus and the size of atom decrease.
b) on moving from left to right in a period ,the metallic character of elements decreases but the non metallic character increases.
Answer B
a) Li and Na are considered as active metals because their valency in one and they are very high reactive metals.
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Answer:
Answer A part
Answer a) Na is bigger than Mg because as we go from left to right in a period atomic size decreases and nuclear attraction increases.
Answer b) most metallic is Na and non metallic is Cl
Answer B part
Answer a)Li and Na are considered as active metals because they are highly electropositive or they have a tendency to lose electrons. Metals have the tendency to lose electrons.
Answer b) atomic size of Mg is less than Na which i answered in first que Na is bigger than Mg same answer.
Answer c)Fluorine is the highest electronegative element. It is more electro negative than Cl. So it is more reactive than Cl.