Periodic Table

Free sample questions

Periodic Table — sample Science questions with answers

1. Question 1

   The modern Periodic Table arranges elements in increasing order of which property?

   • AProton number
   • BNucleon number
   • CAtomic mass
   • DNumber of neutrons

   Answer: A. Proton number

   Elements in the Periodic Table are arranged in increasing order of proton number, which is the number of protons in the nucleus of an atom of that element.

2. Question 2

   The atomic structure consists of subatomic particles. Which particles are found in the nucleus of an atom?

   • AProtons and electrons only
   • BProtons and neutrons only
   • CNeutrons and electrons only
   • DProtons, neutrons, and electrons

   Answer: B. Protons and neutrons only

   The nucleus of an atom is located at the centre and contains positively charged protons and neutral neutrons. Electrons move around the nucleus in orbits.

3. Question 3

   Which of the following properties is a physical characteristic that distinguishes metals from non-metals?

   • AMalleability
   • BHaving a very low melting point
   • CBrittle and easily break when hammered
   • DWeak electrical conductor

   Answer: A. Malleability

   Metals are malleable, meaning they can be hammered or pressed into thin sheets without breaking. In contrast, most non-metals are brittle.

4. Question 4

   Which of the following elements is an example of a non-metal?

   • ACopper ($\text{Cu}$)
   • BAluminium ($\text{Al}$)
   • CCarbon ($\text{C}$)
   • DSodium ($\text{Na}$)

   Answer: C. Carbon ($\text{C}$)

   Carbon ($\text{C}$) is a non-metal, while copper ($\text{Cu}$), aluminium ($\text{Al}$), and sodium ($\text{Na}$) are examples of metals.

5. Question 5

   Subatomic particle $X$ moves around the nucleus in its own orbit and has a negative charge. What is particle $X$?

   • AProton
   • BNeutron
   • CElectron
   • DMolecule

   Answer: C. Electron

   Electron is a negatively charged subatomic particle that moves in shells around the nucleus of an atom.