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Questions on topic structure of atom from class 11 chemistry

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Q1. What is the basic unit of an element?
Atom
Molecule
Ion
Compound
Q2. Which subatomic particle has a positive charge?
Electron
Proton
Neutron
Photon
Q3. What is the mass number of an atom?
Number of protons
Number of neutrons
Sum of protons and neutrons
Sum of protons and electrons
Q4. Which of the following statements is true about electrons?
They have a positive charge
They are found in the nucleus
They have negligible mass
They are heavier than protons
Q5. What determines the chemical properties of an element?
Number of neutrons
Number of electrons
Number of protons
Mass number
Q6. Which model describes the atom as having a nucleus surrounded by electrons in defined orbits?
Thomson's model
Rutherford's model
Bohr's model
Quantum mechanical model
Q7. What is the charge of a neutron?
Positive
Negative
Neutral
Varies
Q8. The atomic number of an element is defined as the number of:
Protons
Neutrons
Electrons
Nucleons
Q9. Which of the following particles is found in the nucleus of an atom?
Electron
Neutron
Photon
All of the above
Q10. In a neutral atom, the number of protons is equal to the number of:
Neutrons
Electrons
Nucleons
Ions