Class 10SciencePeriodic Classification of ElementsMix Examples - Periodic Classification of Elements
Difficult$(a)$ In this ladder (Figure),symbols of elements are jumbled up. Rearrange these symbols of elements in the increasing order of their atomic number in the Periodic Table.
$(b)$ Arrange them in the order of their group also.
$(b)$ Arrange them in the order of their group also.
(N/A) The elements present in the ladder are: $H, He, Li, Be, B, C, N, O, F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, K, Ca$.
Arranging them in increasing order of their atomic number $(Z)$:
$H (1), He (2), Li (3), Be (4), B (5), C (6), N (7), O (8), F (9), Ne (10), Na (11), Mg (12), Al (13), Si (14), P (15), S (16), Cl (17), Ar (18), K (19), Ca (20)$.
$(b)$ Arranging them according to their groups:
Group $1: H, Li, Na, K$
Group $2: Be, Mg, Ca$
Group $13: B, Al$
Group $14: C, Si$
Group $15: N, P$
Group $16: O, S$
Group $17: F, Cl$
Group $18: He, Ne, Ar$
Arranging them in increasing order of their atomic number $(Z)$:
$H (1), He (2), Li (3), Be (4), B (5), C (6), N (7), O (8), F (9), Ne (10), Na (11), Mg (12), Al (13), Si (14), P (15), S (16), Cl (17), Ar (18), K (19), Ca (20)$.
$(b)$ Arranging them according to their groups:
Group $1: H, Li, Na, K$
Group $2: Be, Mg, Ca$
Group $13: B, Al$
Group $14: C, Si$
Group $15: N, P$
Group $16: O, S$
Group $17: F, Cl$
Group $18: He, Ne, Ar$
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Similar Questions
An element $X$ belongs to the $3rd$ period and group $13$ of the Modern Periodic Table.
$(a)$ Determine the valence electrons and the valency of $X$.
$(b)$ Determine the molecular formula of the compound formed when $X$ reacts with an element $Y$ (atomic number $= 8$).
$(c)$ Write the name and formula of the compound formed when $X$ combines with chlorine.
$(a)$ Determine the valence electrons and the valency of $X$.
$(b)$ Determine the molecular formula of the compound formed when $X$ reacts with an element $Y$ (atomic number $= 8$).
$(c)$ Write the name and formula of the compound formed when $X$ combines with chlorine.
Medium
View SolutionGive reasons for the following:
$(a)$ Lithium atom is smaller than Sodium atom.
$(b)$ Chlorine (Atomic Number $17$) is more electronegative than Sulphur (Atomic Number $16$).
$(a)$ Lithium atom is smaller than Sodium atom.
$(b)$ Chlorine (Atomic Number $17$) is more electronegative than Sulphur (Atomic Number $16$).
Medium
View SolutionThe atomic number of an element is $17$. Predict $(a)$ its valency,$(b)$ whether it is a metal or non-metal,$(c)$ its relative size with respect to other members of its group. Justify your answer in each case.
Medium
View SolutionThe electronic configurations of $4$ elements $A, B, C,$ and $D$ are as follows:
$A: 2, 1$
$B: 2, 2$
$C: 2, 8, 2$
$D: 2$
$(a)$ Which of these elements belong to the same group? Name them.
$(b)$ Which of these elements belong to the same period? Name them.
$(c)$ Which of these elements is inert? Name it.
$A: 2, 1$
$B: 2, 2$
$C: 2, 8, 2$
$D: 2$
$(a)$ Which of these elements belong to the same group? Name them.
$(b)$ Which of these elements belong to the same period? Name them.
$(c)$ Which of these elements is inert? Name it.
Medium
View SolutionWhy does the basic character decrease along a period? Give reasons.
Medium
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