Question

XY compound is formed by X (Atomic number 11) and Y (Atomic number 17), then answer the questions given below.

1. Determine the position of the element X and Y periodic table.
2. Which type of elements X and Y are metals, nonmetals or metalloids?
3. From which block the elements X and Y are?
4. Determine the electronic configuration and valency of these elements.

Answer 1

1. Position in the Periodic Table
   • Element X: Placed in Period 3, Group 1 (Since it has 3 electron shells and 1 valence electron).
   • Element Y: Placed in Period 3, Group 17 (Since it has 3 electron shells and 7 valence electrons).
2. Type of Element (Metal/Nonmetal/Metalloid)
   • Element X: It is a metal (specifically, an alkali metal that easily loses its 1 outer electron).
   • Element Y: It is a nonmetal (specifically, a halogen that easily gains 1 electron).
3. Block of the Periodic Table
   • Element X: Belongs to the s-block (its outermost electron enters the s-orbital).
   • Element Y: Belongs to the p-block (its outermost electrons enter the p-orbital).
4. Electronic Configuration and Valency
   • Element X (Atomic Number 11) 
     • Electronic Configuration: 2, 8, 1
     • Valency: 1 (It loses 1 electron to achieve stability)
   • Element Y (Atomic Number 17)
     • Electronic Configuration: 2, 8, 7
     • Valency: 1 (It needs to gain 1 electron to complete its octet of 8 electrons)