ICSE Class 9 Atomic Structure — practice questions
23 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice ICSE Class 9 Atomic Structure in the app →The atomic number of an element equals its number of:Mass number of an atom is the sum of its:Which is the charge on a proton?Mass of a proton compared with that of an electron is:Neutrons have a charge of:Electronic configuration of sodium (Z = 11) is:Maximum number of electrons that can occupy the L shell is:Two atoms have the same mass number but different atomic numbers. They are:The K shell can hold a maximum of:Alpha particles used by Rutherford in his scattering experiment are:Rutherford's experiment showed that an atom is:Bohr's model improved on Rutherford's by:Valence electrons are the electrons in the:Atomic number of chlorine is 17. Its electronic configuration is:An ion is formed when an atom:Magnesium (Z = 12) forms Mg^2+ by losing how many electrons?Chlorine (Z = 17) becomes Cl- by gaining how many electrons?Isotopes of hydrogen include:Why are protons and neutrons together called nucleons?An atom of oxygen has Z = 8 and A = 16. Number of neutrons is:Why does the atomic mass of chlorine (35.5) lie between two integers?If an element has the configuration 2, 8, 8, 1, its valency and likely group are:Which sub-particle was discovered LAST?