Class 10SciencePeriodic Classification of ElementsMix Examples - Periodic Classification of Elements
MediumThe 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.
$(a)$ Inert elements (noble gases) are placed in group $18$.
$(b)$ Elements in group $16$ ($B$ and $E$) gain $2$ electrons to form $B^{2-}$ and $E^{2-}$ ions. Elements in group $17$ ($C$ and $F$) gain $1$ electron to form $C^{-}$ and $F^{-}$ ions.
$(c)$ $F$ would have chemical properties similar to $C$ because they belong to the same group $(17)$.
$(d)$ $A$ is Helium $(He)$, which is in period $1$, so it has only $1$ shell ($K$-shell).
$(e)$ Both $A$ and $D$ are inert noble gases belonging to group $18$, meaning they have stable electronic configurations (complete valence shells).
$(f)$ $B$ (Oxygen) is the most abundant element in the earth's crust.
$(b)$ Elements in group $16$ ($B$ and $E$) gain $2$ electrons to form $B^{2-}$ and $E^{2-}$ ions. Elements in group $17$ ($C$ and $F$) gain $1$ electron to form $C^{-}$ and $F^{-}$ ions.
$(c)$ $F$ would have chemical properties similar to $C$ because they belong to the same group $(17)$.
$(d)$ $A$ is Helium $(He)$, which is in period $1$, so it has only $1$ shell ($K$-shell).
$(e)$ Both $A$ and $D$ are inert noble gases belonging to group $18$, meaning they have stable electronic configurations (complete valence shells).
$(f)$ $B$ (Oxygen) is the most abundant element in the earth's crust.
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Similar Questions
Two elements $X$ and $Y$ have atomic numbers $11$ and $16$ respectively.
$(a)$ Write the electronic configuration of both.
$(b)$ Which type of bond will they form?
$(c)$ Write the formula of the compound formed by their combination (in terms of $X$ and $Y$).
$(a)$ Write the electronic configuration of both.
$(b)$ Which type of bond will they form?
$(c)$ Write the formula of the compound formed by their combination (in terms of $X$ and $Y$).
Medium
View SolutionMendeleev predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium.
$(a)$ Classify these elements as metals,non-metals,or metalloids.
$(b)$ How many valence electrons are present in each one of them?
$(a)$ Classify these elements as metals,non-metals,or metalloids.
$(b)$ How many valence electrons are present in each one of them?
Medium
View SolutionComplete 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.
Difficult
View SolutionWrite true or false for the statement: The term atomic size refers to the distance between the centre of the nucleus and the penultimate shell of an isolated atom.
Easy
View SolutionCan the following groups of elements be classified as Dobereiner's triad?
$(a)$ $Na, Si, Cl$
$(b)$ $Be, Mg, Ca$
Atomic mass of $Be = 9, Na = 23, Mg = 24, Si = 28, Cl = 35, Ca = 40$. Explain by giving reasons.
$(a)$ $Na, Si, Cl$
$(b)$ $Be, Mg, Ca$
Atomic mass of $Be = 9, Na = 23, Mg = 24, Si = 28, Cl = 35, Ca = 40$. Explain by giving reasons.
Medium
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