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Non-Metals

From among th...

Question

From among the elements, choose the following:
Cl, Br, F, O, Al, C, Li, Cs and Xe
The element which has the smallest radius.

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Solution

F is the element which has the smallest radius since it belongs to 2nd period and 17th group. On moving from left to right size decreases in a period.

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Q. Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
a. ₃Li, ₁₄He, ₁₁Na, ₁₅P Which of these elements belong to be period 3?
b. ₁H, ₇N,₂₀Ca, ₁₆S, ₄Be, ₁₈Ar Which of these elements belong tot he second group?
c. ₇N, ₆C, ₈O, ₅B, ₁₃Al Which is the most electronegative element among these?
d. ₄Be, ₆C, ₈O, ₅B, ₁₃Al Which is the most electropositive element among these?
e. ₁₁Na, ₁₅P, ₁₇Cl, ₁₄Si, ₁₂Mg Which of these has largest atoms?
f. ₁₉K,₃Li, ₁₁Na, ₄Be Which of these atoms has smallest atomic radius?
g. ₁₃Al, ₁₄Si,₁₁Na, ₁₂Mg, ₁₆S Which of the above elements has the highest metallic character?
h. ₆C, ₃Li, ₉F,₇N, ₈O Which of the above elements has the highest nonmetallic character?

The increasing order of reactivity among group 1 elements is Li < Na < K < Rb <Cs whereas that among group 17 elements is F > CI > Br > I. Explain.

Q. from the elements Cl,Br,F,O,Al,C,Li,Xe which one is liquid at room temp,which element has the smallest radius and most electropositive

Q. For the elements:

C l, B r, F, A l, C, L i, C s

X e

.
Choose the best option. The element having 8 electrons in the outermost shell is:

Q. Among the elements of the second period pick out the element which has a smallest atomic radius.

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