List of top Chemistry Questions on Atomic Structure asked in BITSAT

The screening effect of d-electrons is
Chloride ion and potassium ion are isoelectronic. Then
The number of radial nodes of 3s and 2p orbitals are respectively
Given the following data: l r Reaction & Energy change (kJ)
Li(s)→ Li(g) & 161
Li(g)→ Li⁺(g) & 520
(1)/(2)F₂(g)→ F(g) & 77
F(g)+e⁻→ F⁻(g) & x
Li⁺(g)+F⁻(g)→ LiF(s) & -1047
Li(s)+(1)/(2)F₂(g)→ LiF(s) & -617 Based on the data provided, the value of electron gain enthalpy of fluorine would be:
The decreasing order of the ionization potential of the following elements is:
Which one of the following does not follow octet rule?
The element with atomic number 118 will be
According to molecular orbital theory which statement about the magnetic character and bond order is correct regarding O₂?
Amongst the elements with following electronic configurations, which one may have the highest ionisation energy?
The number of radial nodes of 3s and 2p orbitals are respectively
The decreasing order of the ionization potential of the following elements is:
The element with atomic number 118 will be:
Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?
The valency shell of element A contains 3 electrons while the valency shell of element B contains 6 electrons. If A combines with B, the probable formula of the compound formed will be:
The screening effect of \( d \)-electrons is
When the first ionisation energies are plotted against atomic number, the peaks are occupied by
The ions \( \text{O}^{2-} \), \( \text{F}^- \), \( \text{Na}^+ \), \( \text{Mg}^{2+} \) and \( \text{Al}^{3+} \) are isoelectronic. Their ionic radii show:
If the radius of \( H \) is 0.53 Å, then what will be the radius of \( Li^{2+} \)?
Which of the following does not have valence electron in 3d-subshell?
The correct order of radii is:
The vapour density of ozone is
Chloride ion and potassium ion are isoelectronic. Then
Which of the following pairs has both members from the same period of the periodic table
In the periodic table, with the increase in atomic number, the metallic character of an element