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An isotope of atomic mass 25 has 13 neutrons in its neucleus .What is its atomic number and what are the name and chemicalsymbol of the element ?
What is the oxidation number and valency of carbon in methanal (HCHO) ?
The atom of an element is made up of 4 protons, 5 neutrons and 4 electrons. What are its atomic number and mass number?
An element 'X' has mass number 35 and number of neutrons 18. Write atomic number and electronic configuration of 'X'. Also write group number, period number and valency of 'X'.
An atom having atomic mass number 13 has 7 neutrons. What is the atomic number of the atom.
If an isotope of hydrogen has two neutrons in its atom, its atomic number and mass number will respectively be
If number of electrons in an atom is 8 and number of protons is also 8, then (i) what is the atomic number of the atom? and (ii) what is the charge on the atoms ?
The atomic mass of thorium is 232 and its atomic number is 90. During the course of its radioactive disintegration 6 alpha and 4 beta particles are emitted. What is the atomic mass and atomic number of the atom?
What information do you get from the figure about the atomic number, mass number and valency of atoms X, Y and Z ? Give your answer in a tabular form.
If the atomic weight of Zn in 70 and its atomic number in 30 , Then what be the atomic weight of Zn^(2+) ?
ICSE-ATOMIC STRUCTURE -EXERCISES (Diagram based questions)
