List of top Chemistry Questions on Atomic Structure asked in AP EAPCET

Which of the following sets of molecules / ions represent isoelectronic species?

The threshold frequency of a metal is \(1.15 \times 10^{15}\) Hz. If electrons with kinetic energy of \(0.20\) eV are ejected when this metal surface is irradiated with photons of frequency '\(\nu\)', the value of \(\nu\) is (\(h=6.60 \times 10^{-34}\) Js, \(1\) eV \(=1.6 \times 10^{-19}\) J)

The total number of electrons, protons and neutrons present in the three isotopes of hydrogen is

A photon of energy 12.09 eV is absorbed by a hydrogen atom in its first excited state, resulting in the ejection of an electron. The kinetic energy (in J) of the emitted photoelectron is ($1 eV = 1.6 \times 10^{-19}$ J, $R_H = 13.6$ eV):

Which of the following statement is not correct?

The work function of a metal M is 6.3 eV. The wavelength of the incident radiation required to just eject the electrons from its surface (in nm) is:

Work function \((W_0)\) values of six metals (in eV) are given below:

How many of the above metals do not eject electrons when they are struck with radiation of wavelength 400 nm?

Among the ions \(\mathrm{O^{2-}},\ \mathrm{Na^+},\ \mathrm{F^-},\ \mathrm{N^{3-}},\ \mathrm{Mg^{2+}}\), the ions with smallest and largest radii are respectively

The correct order of atomic radii of the elements O, N, S and P is

The bond order of dioxygen is \(m\). The bond order values of \(N_2^{+}\) and \(C_2^{2-}\) are respectively

An element has \(d^5\) configuration. The total number of electron exchanges possible for it is

The correct electronic configuration of the element Au is