PPSC Senior Clerk (BS-14) Everyday Science: Periodic Table MCQs

PPSC Senior Clerk (BS-14) Everyday Science: Periodic Table MCQs — sample questions

1. Question 1

   Q1. What is the atomic number of carbon?

   • A) 6
   • B) 8
   • C) 12
   • D) 4

   Answer: 6

   Explanation: Carbon has atomic number 6, meaning it has 6 protons in its nucleus; its atomic mass is approximately 12 u.

2. Question 2

   Q2. What is the chemical symbol for gold?

   • A) Au
   • B) Go
   • C) Gd
   • D) Ag

   Answer: Au

   Explanation: Gold's chemical symbol is Au, derived from the Latin word "Aurum." Its atomic number is 79 on the periodic table.

3. Question 3

   Q3. Which element has the highest atomic number on the standard periodic table?

   • A) Uranium (U)
   • B) Oganesson (Og)
   • C) Plutonium (Pu)
   • D) Radium (Ra)

   Answer: Oganesson (Og)

   Explanation: Oganesson (Og) has atomic number 118 and is currently the last element on the periodic table; uranium (92) and plutonium (94) are much lower.

4. Question 4

   Q4. What is the lightest element on the periodic table?

   • A) Helium
   • B) Hydrogen
   • C) Lithium
   • D) Carbon

   Answer: Hydrogen

   Explanation: Hydrogen (H) is the lightest and most abundant element in the universe, with atomic number 1 and atomic mass approximately 1 u.

5. Question 5

   Q5. The chemical symbol for iron is:

   • A) Ir
   • B) Fe
   • C) In
   • D) Fr

   Answer: Fe

   Explanation: Iron's symbol Fe comes from the Latin "Ferrum"; iron has atomic number 26 and is essential in steel production and biological processes.