Structure of the Atom
Chemistry ⇒ Atomic Structure and the Periodic Table
Structure of the Atom starts at 7 and continues till grade 12.
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See sample questions for grade 11
A neutral atom of element X has 15 electrons. What is its atomic number?
An atom has 17 protons, 18 neutrons, and 17 electrons. What is its mass number?
An atom of sodium has an atomic number of 11 and a mass number of 23. How many neutrons does it have?
Calculate the number of neutrons in an atom of carbon-14.
Define the term 'isotope'.
Describe the main difference between the Bohr model and the quantum mechanical model of the atom.
Explain why atoms are electrically neutral.
If an atom has 20 protons, 20 neutrons, and 18 electrons, what is its overall charge?
State the charge and location of a proton in an atom.
State the main postulate of Bohr’s model of the atom regarding electron orbits.
The relative atomic mass of chlorine is 35.5. Explain why it is not a whole number.
What is the maximum number of electrons that can be accommodated in the second shell (n=2) of an atom?
Which scientist discovered the electron?
Which scientist is credited with the discovery of the neutron?
Which subatomic particle has a relative charge of +1?
Which subatomic particle is responsible for the chemical properties of an atom?
Who proposed the nuclear model of the atom?
