Structure of the Atom
Thomson, Rutherford, Bohr models, electron configuration, valency, isotopes.
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Take a full mock →Q1 · Structure of the Atom · EASY
An atom of potassium (K) has atomic number 19 and mass number 39. How many neutrons are present in the nucleus of this atom?
Q2 · Structure of the Atom · MEDIUM
Chlorine has two isotopes: Cl-35 (with 17 protons and 18 neutrons) and Cl-37 (with 17 protons and 20 neutrons). Which of the following statements correctly describes these isotopes?
Q3 · Structure of the Atom · MEDIUM
According to Bohr's model of the atom, the maximum number of electrons that can be accommodated in the third shell (n=3) is 18. An element has electronic configuration 2, 8, 7. If this element gains one electron to achieve a stable configuration, what will be the distribution of electrons in its ion?
Q4 · Structure of the Atom · MEDIUM
An element X has an atomic number 17 and mass number 35. How many neutrons are present in one atom of this element?
Q5 · Structure of the Atom · EASY
An atom has 17 protons and 18 neutrons. What is its mass number?