Which of the following statement$(s)$ is/are correct?

  • A
    $2^{nd}$ electron gain enthalpy is always endothermic
  • B
    Electronegativity is the property of bonded atoms
  • C
    $Al_2O_3$ and $BeO$ are amphoteric oxides
  • D
    All of these

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Similar Questions

Which of the following statements are not correct?
$A.$ The electron gain enthalpy of $F$ is more negative than that of $Cl$.
$B.$ Ionization enthalpy decreases in a group of the periodic table.
$C.$ The electronegativity of an atom depends upon the atoms bonded to it.
$D.$ $Al_2O_3$ and $NO$ are examples of amphoteric oxides.
Choose the most appropriate answer from the options given below:

Given below are two statements :
Statement $I$ : $K > Mg > Al > B$ is the correct order in terms of metallic character.
Statement $II$ : Atomic radius is always greater than the ionic radius for any element.
In the light of the above statements, choose the correct answer from the options given below

Elements having atomic numbers $33, 47, 53, 59, 68, 74, 82$ are present in which blocks of the periodic table?

Identify the correct statements from the following.
$(i)$ In the periodic table,about $78 \%$ of elements are metals.
$(ii)$ In a group,the metallic character decreases from top to bottom and in a period the nonmetallic character decreases from left to right.
$(iii)$ The element $Ho$ belongs to $f-$block.

Match the properties of elements given in List-$I$ with List-$II$.
List-$I$ List-$II$
$(1)$ Active non-metal with high electron gain enthalpy. $(A)$ $Na$
$(2)$ Soft metal with low ionization enthalpy. $(B)$ $Sb$
$(3)$ Metalloid that forms ${M_2}{O_3}$ type oxide. $(C)$ $He$
$(4)$ Chemically inert gas. $(D)$ $Cl$

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