Structure of Atom questions
799 published questions with worked solutions.
- Number of neutrons in the heaviest isotopes of hydrogen is…….
- The sum of number of neutrons and protons in one of the isotopes of hydrogen is:
- The number of protons, electrons and neutrons respectively in a molecule of heavy water is:
- The first ionization energy for H, He, Li and Be has one of the following values : 5.4, 9.3, 13.6 and 24.6 eV. Which of these...
- The sum of number of protons, electrons and neutrons in the heaviest isotope of hydrogen is _______.
- Number of neutrons in ^9_4Be^ 3+ is _____
- Sodium chloride imparts a golden yellow colour to the Bunsen flame. This can be interpreted due to:
- The total number of s-electrons in _ 19 K is ______.
- The number of valence electrons in an **excited** carbon atom, and their orbital distribution, is
- The phenomenon of emission of visible light as a result of chemical change is known as [DCE 2005]
- The last (outermost) orbit of argon would have electrons
- Number of isotopes of oxygen is:
- The discovery of isotopes began with experiments with:
- Statement 1: The free gaseous Cr atom has six unpaired electrons. Statement 2: Half filled s-orbital has greater stability.
- Cr^+ (23 electrons) has _____ electrons in (n-1)d orbitals.
- Fe^ 2+ (24 electrons) has _____ electrons in 3d orbitals.
- Number of electrons present in the outermost orbit of Fe atom is:
- Aufbau's principle is not valid for:
- In a multi-electron atom, the energy of a 2p-orbital is:
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