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 10
An atom has 6 protons, 6 neutrons, and 6 electrons. What is its atomic number and mass number?
An atom of magnesium has 12 protons and 12 electrons. If it loses two electrons, what is the charge on the resulting ion?
An atom of sodium has 11 protons, 12 neutrons, and 11 electrons. What is its mass number?
Calculate the number of neutrons in an atom of phosphorus with mass number 31 and atomic number 15.
Describe the main difference between the plum pudding model and the nuclear model of the atom.
Describe what is meant by the term 'isotope'.
Explain why atoms are electrically neutral.
Explain why isotopes of the same element have different mass numbers but the same atomic number.
If an atom has 17 protons and 18 neutrons, what is its mass number?
Name the scientist who discovered the electron.
The atomic number of chlorine is 17. How many electrons are present in a neutral atom of chlorine?
What is the charge of a neutron?
What is the difference between atomic number and mass number?
What is the electronic configuration of an oxygen atom (atomic number 8)?
What is the main reason for the stability of noble gases?
What is the maximum number of electrons that can be accommodated in the second shell (n=2) of an atom?
What is the symbol for the isotope of carbon with mass number 14?
Which subatomic particle determines the chemical properties of an element?
Which subatomic particle is responsible for the identity of an element?
