List of top Chemistry Questions on Atomic Structure asked in KEAM

Which one of the following molecules has the lowest bond length (in pm)?

The molecule with expanded octet is

According to the law of triads, the properties of the middle element were in between those of the other two elements. This law was proposed by

Mendeleev called the undiscovered element after aluminium at his time as Eka-aluminium. What is the present name of the element after its discovery?

Which one of the following elements has the largest atomic radius?

The quantum number symbols are given in List-I and the informations about them are given in List-II. The correct match is}

Which one of the following is not isoelectronic with other isoelectronic species?

From the following pairs of ions which one is not an iso-electronic pair?

Bond order of $NO^+$ is

Which of the following species will have the largest and the smallest sizes respectively? Na, Mg, $Na^{+}$, $Mg^{2+}$

In which one of the following compounds, there is complete octet of central atom

Which of the following statement is incorrect about bond order?

The IUPAC name of an element is Unnilbium. Its atomic number is

The number of electrons, protons and neutrons in a species are equal to \(10\), \(11\) and \(12\) respectively. The proper symbol of the species is

Which one of the following element is represented as Eka-Silicon in Mendeleev's periodic table?

The correct order of first ionisation enthalpies of the following elements is

Which of the following changes in the respective bond order values are caused by removal of an electron from N$_2$ and F$_2$ molecules?

An odd electron molecule among the following is

Which of the following are isoelectronic species?
(i) NH\textsubscript{3 (ii) CH\textsubscript{3}\textsuperscript{+} (iii) NH\textsubscript{2}\textsuperscript{--} (iv) NH\textsubscript{4}\textsuperscript{+}
Choose the correct answer from the codes given below}

Which of the following are isoelectronic species?
(i) NH\textsubscript{3 (ii) CH\textsubscript{3}\textsuperscript{+} (iii) NH\textsubscript{2}\textsuperscript{--} (iv) NH\textsubscript{4}\textsuperscript{+}
Choose the correct answer from the codes given below}

Which of the following are isoelectronic species?
(i) NH\textsubscript{3 (ii) CH\textsubscript{3}\textsuperscript{+} (iii) NH\textsubscript{2}\textsuperscript{--} (iv) NH\textsubscript{4}\textsuperscript{+}
Choose the correct answer from the codes given below}