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Question
XY compound is formed by X (Atomic number 11) and Y (Atomic number 17), then answer the questions given below.
- Determine the position of the element X and Y periodic table.
- Which type of elements X and Y are metals, nonmetals or metalloids?
- From which block the elements X and Y are?
- Determine the electronic configuration and valency of these elements.
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Solution
- 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).
- 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).
- 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).
- 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)
- Element X (Atomic Number 11)
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