Class 10SciencePeriodic Classification of ElementsMix Examples - Periodic Classification of Elements
MediumThe atomic number of $Na$ and $Mg$ is $11$ and $12$ respectively and they belong to the same period.
$(a)$ Which one would have smaller atomic size?
$(b)$ Which one would be more electropositive?
$(c)$ To which group would each one belong?
$(a)$ Which one would have smaller atomic size?
$(b)$ Which one would be more electropositive?
$(c)$ To which group would each one belong?
(A-D) Magnesium $(Mg)$ has a smaller atomic size than Sodium $(Na)$. As we move from left to right across a period,the nuclear charge increases,which pulls the electrons closer to the nucleus,resulting in a decrease in atomic radius.
$(b)$ Sodium $(Na)$ is more electropositive than Magnesium $(Mg)$. Electropositivity is the tendency of an atom to lose electrons. Since $Na$ has a lower nuclear charge and a larger atomic size,it can lose its valence electron more easily than $Mg$.
$(c)$ Sodium $(Na)$ belongs to Group $1$ (Alkali metals),and Magnesium $(Mg)$ belongs to Group $2$ (Alkaline earth metals).
$(b)$ Sodium $(Na)$ is more electropositive than Magnesium $(Mg)$. Electropositivity is the tendency of an atom to lose electrons. Since $Na$ has a lower nuclear charge and a larger atomic size,it can lose its valence electron more easily than $Mg$.
$(c)$ Sodium $(Na)$ belongs to Group $1$ (Alkali metals),and Magnesium $(Mg)$ belongs to Group $2$ (Alkaline earth metals).
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Similar Questions
Arrange the following elements in increasing order of their atomic radii.
$(a)$ $Li, Be, F, N$
$(b)$ $Cl, At, Br, I$
$(a)$ $Li, Be, F, N$
$(b)$ $Cl, At, Br, I$
Medium
View Solution$(a)$ Why do we classify elements?
$(b)$ What were the two criteria used by Mendeleev in creating his Periodic Table?
$(c)$ Why did Mendeleev leave some gaps in his Periodic Table?
$(d)$ In Mendeleev's Periodic Table,why was there no mention of noble gases like Helium,Neon,and Argon?
$(e)$ Would you place the two isotopes of chlorine,$Cl-35$ and $Cl-37$,in different slots because of their different atomic masses or in the same slot because their chemical properties are the same? Justify your answer.
$(b)$ What were the two criteria used by Mendeleev in creating his Periodic Table?
$(c)$ Why did Mendeleev leave some gaps in his Periodic Table?
$(d)$ In Mendeleev's Periodic Table,why was there no mention of noble gases like Helium,Neon,and Argon?
$(e)$ Would you place the two isotopes of chlorine,$Cl-35$ and $Cl-37$,in different slots because of their different atomic masses or in the same slot because their chemical properties are the same? Justify your answer.
Medium
View SolutionFour elements $P, Q, R$ and $S$ have atomic numbers $12, 13, 14$ and $15$ respectively.
Answer the following questions giving reasons:
$(i)$ What is the valency of $Q$?
$(ii)$ Classify these elements as metals and non-metals.
$(iii)$ Which of these elements will form the most basic oxide?
Answer the following questions giving reasons:
$(i)$ What is the valency of $Q$?
$(ii)$ Classify these elements as metals and non-metals.
$(iii)$ Which of these elements will form the most basic oxide?
Medium
View SolutionWhich of the following statements about the Modern Periodic Table is correct?
Easy
View SolutionThe position of some elements $A, B, C, D, E, F$ and $G$ in the Modern Periodic Table is given as under:
Group $\to$ $16$ $17$ $18$ Period $1$ $A$ Period $2$ $B$ $C$ $D$ Period $3$ $E$ $F$ $G$
$(a)$ In which group are inert elements placed?
$(b)$ What type of ions would $B, C, E,$ and $F$ form?
$(c)$ Which element would have chemical properties similar to $C$?
$(d)$ How many shells would $A$ have?
$(e)$ What is the similarity between $A$ and $D$?
$(f)$ Identify the most abundant element in the earth's crust.
| Group $\to$ | $16$ | $17$ | $18$ |
| Period $1$ | $A$ | ||
| Period $2$ | $B$ | $C$ | $D$ |
| Period $3$ | $E$ | $F$ | $G$ |
$(a)$ In which group are inert elements placed?
$(b)$ What type of ions would $B, C, E,$ and $F$ form?
$(c)$ Which element would have chemical properties similar to $C$?
$(d)$ How many shells would $A$ have?
$(e)$ What is the similarity between $A$ and $D$?
$(f)$ Identify the most abundant element in the earth's crust.
Medium
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