Quiz  /  Chemistry Class 10 MCQ Questions With Answers

  • 1. 
    What is the atomic mass of this atom?

  • 1
  • 3
  • 4
  • 7

  • 2. 
    Why type of bond is forming between the atoms in the diagram?

  • Ionic
  • Covalent

  • 3. 
    B and C are found in the ______ of an atom.

  • electron cloud
  • Space
  • Nucleus
  • Outside

  • 4. 
    An ionic bond forms when

  • valence electrons are shared back and forth (move between) two atoms.
  • a sea of mobile electrons surround the cations and they then become negativly charged
  • valence electrons are transferred from one atom to another, forming charged ions that are then pulled together by attraction between opposite charges
  • none of the above

  • 5. 
    In the atom diagram shown, A is pointing to the darker particles, these are known as

  • electrons
  • protons
  • neutrons
  • the nucleus

  • 6. 
    In this chemical equation, the elements in red are the_______.

  • Products
  • Reactants
  • Subscripts
  • Coefficients

  • 7. 
    Using the information provided, determine how many electrons the a Boron atom contains.

  • 2.5
  • 5
  • 6
  • 10.81

  • 8. 
    Covalent bonds form when

  • the electronegativity difference between two atoms is very large.
  • electrons are completely transferred between two atoms.
  • pairs of electrons are shared between two atoms.
  • ions are held together by opposite charges.

  • 9. 
    Which of the following is described as the basic unit of matter?

  • Element
  • Atom
  • Molecule
  • Compound

  • 10. 
    Is this image an example of covalent bonding?

  • Yes
  • No

  • 11. 
    How many protons does this atom have?

  • 2.5
  • 6
  • 5
  • 10.811

  • 12. 
    Which of the following is found in the nucleus of an atom?

  • electrons
  • neutrons
  • The center of an atom, composed of protons and neutrons
  • molecules

  • 13. 
    In the atom diagram shown, E is pointing to

  • An electron
  • a proton
  • a neutron
  • the nucleus

  • 14. 
    What charge does an electron have?

  • Negative
  • Positive
  • Neutral
  • Contrated

  • 15. 
    What type of bond is forming between oxygen and hydrogen?

  • Ionic
  • Covalent

  • 16. 
    What is the atomic number of this atom?

  • 4
  • 5
  • 9
  • none of the above
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