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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