2024 THIRD TERM MID-TERM TEST ON CHEMISTRY JSS 2

1.Which of the following is a metalloid?

2. N shell will have maximum of_______ electrons

3. Helium and element "X" have outer electron configuration of ns2. identify the element "X"

4. The atomic number of calcium is

5. How many electrons are there in the outermost shell of a group 6 element?

6. Electroplating takes place when _______ is passed into the electrolyte.

7. Water is decomposed into hydrogen and oxygen by means of an electric current through the method of_________

8. In the process of refining of metals, the impure metal is made as _______

9. In an electrolytic cell, the electrode at which the electrons enter the solution is called the ______

10. What is the name given to a solution or liquid that conducts electricity?

SUBJECTIVES

1. The English chemist which is associated with new method of electrolysis is _________

2. ______ revolves round the orbitals of an atom of an element?

3. _________ is the electronic configuration of aluminium in spdf

4. _______ serves as the cathode in the extraction of iron from its ore

5. ______ is an example of non-electrolyte

ESSAY | ANSWER ONLY TWO QUESTIONS

1a. What is electronic configuration? 1b. Using orbital diagram; show the electronic configuration of i: fluorine ii: potassium 1c. Using shell format; show the electronic configuration of i: beryllium ii: calcium

2a. Explain the term electrolysis 2b. Differentiate between an electrolyte and non-electrolyte 2c. State Faraday's first law of electrolysis

3a. Explain Electrodes 3b. Draw and label an electrolytic cell