Question 6 :
Read the following questions for N, P, C, Si elements.<br/>(i) Element which has least atomic radii<br/>(ii) Element which has maximum ionization energy<br/>(iii) Element which has least electron affinity<br/>(iv) Element which has Maximum electronegativity<br/>Select the correct code of elements for given questions respectively.<br/>

Question 7 :
The metal which does not give amphoteric oxide in the solution?

Question 9 :
Which of the following statement(s) is/are correct&#160;about the modern periodic table?<br/>

Question 11 :
The ground state electronic configurations of the elements, U, V, W, X and Y (these symbols do not haveany chemical significance) are as follows:<br>U $1s^2 2s^2 2p^3$ V $1s^2 2s^2 2p^6 3s^1$<br>W $1s^2 2s^2 2p^6 3 s^2 3p^2$ X $1 s^2 2s^2 2 p^6 3s^2 3p^6 3d^5 4s^2$<br>Y $1 s^2 2s^2 2p^6 3s^2 3p^6 3d^{10} 4s^2 4 p^6$<br>Determine which sequence of elements satisfy the following statements:<br>(i) Element forms a carbonate which is not decomposed by heating<br>(ii) Element is most likely to form coloured ionic compounds<br>(iii) Element has largest atomic radius<br>(iv) Element forms only acidic oxide

Question 12 :
It is not possible to measure the atomic radius precisely since the electron cloud surrounding the atom does not have a sharp boundary. One practical approach to estimate the size of an atom of a non-metallic element is to measure the distance between two atoms when they are bound together by a single bond in a covalent molecule and then dividing by two. For metals, we define the term &#34;metallic radius&#34; which is taken as half the internuclear distance separating the metal cores in the metallic crystal. The van der Waal's radius represents the overall size of the atoms which includes its valence shell in a non bonded situation. It is the half of the distance between two similar atoms in separate molecules in a solid. The atomic radius decreases across a period and increases down the group. Generally, same trends are observed in case of ionic radius. The ionic radius of the species having the same number of electrons depends on the number of protons in their nuclei.<br/><br/>Which of the following statements is correct?

Question 13 :
Which of the following statements is/are true for the long form of the periodic table?

Question 14 :
Which of the following series correctly represents relations between the elements from X to Y?<br>$X \rightarrow Y$<br>

Question 15 :
Most transition metals from multiple cations, that is, they have more than one possible amount of positive charge. Virtually all of the transition metals form dipositive $(2+)$ cations, along with one or more other forms. For example, titanium forms $Ti^{2+}$ ad $Ti^{4+}$, and cobalt forms $Co^{2+}$ and $Co^{3+}$.<br>The principal exceptions to this predominance of cations with a $2^{+}$ charge are scandium and yttrium, which form only tripositive cations. $Sc^{3+}$ and $Y^{3+}$, and copper and silver, which form cations with a single positive charge. $Cu^{+}$ and $Ag^{+}$.<br>[While copper also forms dipositive $Cu^{2+}$, silver exhibits the single positive state essentially exclusively.]<br>Which of the following offers a POSSIBLE explanation for the existence of $Cu^{+}$ and $Ag^{+}$?

Question 17 :
An atom has electronic configuration $1{ s }^{ 2 }\ 2{ s }^{ 2 }2{ p }^{ 6 }\ 3{ s }^{ 2 }3{ p }^{ 6 }3{ d }^{ 3 }\ 4{ s }^{ 2 }$. It will be place it in :

Question 18 :
Non-metals will be out of elements with atomic number $13, 31, 35, 54$.

Question 19 :
Which of the following choices both show the correct order of elements by increasing atomic radius AND by increasing ionization energy?

Question 20 :
Assertion: Atom with large atomic radii and low ionisation potential are more metallic in nature. Reason: Atom with large atomic radii and low ionisation potential have tendency to loose electron