Which of the following element has least number of electrons in its M-shell?
READ MORE +Atomic Structure MCQs
A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at
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Which of the following statements does not form a part of Bohrs model of hydrogen atom?
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The electronic configuration for oxygen is written as 1s2 2s2 2p4. Which rule will this configuration be violating?
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If an atom has four unpaired electrons. What is likely to be the total spin of the electron?
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What is the sequence to label the subshells in an atom?
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The isotopes of a neutral atom of an element differ in which of these?
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What happens to the atomic number during a chemical reaction?
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Who proposed the atomic theory?
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The maximum mass of an atom is concentrated in which of these?
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The electronic configuration of atomic number 20 of an atom is which of the following?
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An atom differs from an ion with respect to which of the following?
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