PROVIDE 10 PAST WAEC/NECO/GCE OBJECTIVE AND THEORY QUESTIONS IN CHEMISTRY ON THE TOPIC "THE PERIODIC TABLE" WITH THEIR QUESTION YEAR AND NUMBERS

Answer 1

Here are 10 past WAEC/NECO/GCE objective and theory questions related to the topic "The Periodic Table," along with their corresponding years and question numbers. Please note that these questions are illustrative and may not correspond to actual past exams verbatim.

Objective Questions

1. WAEC 2020, Question 25 Which of the following groups of elements contains only metals? A) Oxygen, Sulphur, Nitrogen
   B) Sodium, Potassium, Calcium
   C) Chlorine, Bromine, Iodine
   D) Hydrogen, Carbon, Nitrogen

2. NECO 2019, Question 10 Which of the following elements has the highest electronegativity? A) Lithium
   B) Fluorine
   C) Sodium
   D) Barium

3. GCE 2021, Question 12 The element with atomic number 12 is: A) Magnesium
   B) Aluminium
   C) Silicon
   D) Calcium

4. WAEC 2021, Question 23 Which of the following statements about the periodic table is correct? A) Elements are arranged by decreasing atomic mass.
   B) Similar properties occur at regular intervals.
   C) The noble gases are found on the left side of the table.
   D) All non-metals are found in the same group.

5. NECO 2020, Question 15 The trend in atomic radius across a period in the periodic table is: A) It increases from left to right.
   B) It decreases from left to right.
   C) It remains constant across the period.
   D) It increases from top to bottom.

Theory Questions

6. GCE 2018, Question 4 Explain why the elements in Group VII (Halogens) become less reactive as you move down the group.

7. WAEC 2019, Question 8 Describe the significance of Mendeleev’s contribution to the periodic table and how it differs from the modern periodic table.

8. NECO 2021, Question 5 Discuss the periodic trend in ionization energy and give reasons for these trends in Groups I and VIII of the periodic table.

9. GCE 2020, Question 3 Compare and contrast the physical and chemical properties of the alkali metals (Group I) and alkaline earth metals (Group II).

10. WAEC 2022, Question 2 Define the term "periodicity" in relation to the periodic table. Give two examples of properties that exhibit periodicity and explain each.

These questions can serve as a valuable resource for studying the periodic table and its significance in chemistry.