Class 10SciencePeriodic Classification of ElementsMix Examples - Periodic Classification of Elements
DifficultComplete the following crossword puzzle (Figure):
**Across:**
$(1)$ An element with atomic number $12$.
$(3)$ Metal used in making cans and member of Group $14$.
$(4)$ $A$ lustrous non-metal which has $7$ electrons in its outermost shell.
**Down:**
$(2)$ Highly reactive and soft metal which imparts yellow colour when subjected to flame and is kept in kerosene.
$(5)$ The first element of second Period.
$(6)$ An element which is used in making fluorescent bulbs and is second member of Group $18$ in the Modern Periodic Table.
$(7)$ $A$ radioactive element which is the last member of halogen family.
$(8)$ Metal which is an important constituent of steel and forms rust when exposed to moist air.
$(9)$ The first metalloid in Modern Periodic Table whose fibres are used in making bullet-proof vests.
**Across:**
$(1)$ An element with atomic number $12$.
$(3)$ Metal used in making cans and member of Group $14$.
$(4)$ $A$ lustrous non-metal which has $7$ electrons in its outermost shell.
**Down:**
$(2)$ Highly reactive and soft metal which imparts yellow colour when subjected to flame and is kept in kerosene.
$(5)$ The first element of second Period.
$(6)$ An element which is used in making fluorescent bulbs and is second member of Group $18$ in the Modern Periodic Table.
$(7)$ $A$ radioactive element which is the last member of halogen family.
$(8)$ Metal which is an important constituent of steel and forms rust when exposed to moist air.
$(9)$ The first metalloid in Modern Periodic Table whose fibres are used in making bullet-proof vests.
(N/A) The answers to the crossword puzzle are as follows:
**Across:**
$(1)$ Magnesium ($Mg$,atomic number $12$)
$(3)$ Tin ($Sn$,Group $14$)
$(4)$ Iodine ($I$,halogen with $7$ valence electrons)
**Down:**
$(2)$ Sodium ($Na$,highly reactive,yellow flame,stored in kerosene)
$(5)$ Lithium ($Li$,first element of Period $2$)
$(6)$ Neon ($Ne$,used in fluorescent bulbs,second member of Group $18$)
$(7)$ Astatine ($At$,radioactive halogen)
$(8)$ Iron ($Fe$,constituent of steel,forms rust)
$(9)$ Boron ($B$,metalloid,used in bullet-proof vests)
**Across:**
$(1)$ Magnesium ($Mg$,atomic number $12$)
$(3)$ Tin ($Sn$,Group $14$)
$(4)$ Iodine ($I$,halogen with $7$ valence electrons)
**Down:**
$(2)$ Sodium ($Na$,highly reactive,yellow flame,stored in kerosene)
$(5)$ Lithium ($Li$,first element of Period $2$)
$(6)$ Neon ($Ne$,used in fluorescent bulbs,second member of Group $18$)
$(7)$ Astatine ($At$,radioactive halogen)
$(8)$ Iron ($Fe$,constituent of steel,forms rust)
$(9)$ Boron ($B$,metalloid,used in bullet-proof vests)
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Similar Questions
An element $X$ belongs to the $3rd$ period and group $16$ of the Modern Periodic Table.
$(a)$ Determine the number of valence electrons and the valency of $X$.
$(b)$ Write the molecular formula of the compound formed when $X$ reacts with hydrogen and draw its electron dot structure.
$(c)$ Name the element $X$ and state whether it is metallic or non-metallic.
$(a)$ Determine the number of valence electrons and the valency of $X$.
$(b)$ Write the molecular formula of the compound formed when $X$ reacts with hydrogen and draw its electron dot structure.
$(c)$ Name the element $X$ and state whether it is metallic or non-metallic.
Medium
View SolutionProperties of the elements are given below. Where would you locate the following elements in the periodic table?
$(a)$ An element which is an inert gas with atomic number $2$.
$(b)$ An element whose thin oxide layer is used to make other elements corrosion resistant by the process of 'anodising'.
$(a)$ An element which is an inert gas with atomic number $2$.
$(b)$ An element whose thin oxide layer is used to make other elements corrosion resistant by the process of 'anodising'.
Medium
View SolutionGiven below are four elements with their atomic numbers:
Element Atomic Number $A$ $16$ $B$ $11$ $C$ $3$ $D$ $14$
$(a)$ Identify the elements which belong to the same group of the Modern Periodic Table.
$(b)$ Arrange the given elements in decreasing order of atomic size.
$(c)$ Write the formula of the oxide of $B$.
$(d)$ Which of the above elements is a metalloid?
| Element | Atomic Number |
|---|---|
| $A$ | $16$ |
| $B$ | $11$ |
| $C$ | $3$ |
| $D$ | $14$ |
$(a)$ Identify the elements which belong to the same group of the Modern Periodic Table.
$(b)$ Arrange the given elements in decreasing order of atomic size.
$(c)$ Write the formula of the oxide of $B$.
$(d)$ Which of the above elements is a metalloid?
Medium
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
View SolutionGiven below are some elements of the modern periodic table. Atomic numbers of the elements are given in the parentheses: $A(4), B(9), C(14), D(19), E(20)$.
$(a)$ Select the element that has one electron in the outermost shell. Also,write the electronic configuration of this element.
$(b)$ Which two elements amongst these belong to the same group? Give reason for your answer.
$(c)$ Which two elements amongst these belong to the same period? Which one of the two has a bigger atomic radius?
$(a)$ Select the element that has one electron in the outermost shell. Also,write the electronic configuration of this element.
$(b)$ Which two elements amongst these belong to the same group? Give reason for your answer.
$(c)$ Which two elements amongst these belong to the same period? Which one of the two has a bigger atomic radius?
Medium
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