A.
A.
B.
B.
C.
C.
D.
D.
Correct Answer: B
সঠিক উত্তর: B
Explanation
ব্যাখ্যা
To solve this, let's first identify the elements based on their electronic configurations:
X = 2,4 → Atomic number = 6 → Carbon (C)
Y = 2,7 → Atomic number = 9 → Fluorine (F)
Z = 2,1 → Atomic number = 3 → Lithium (Li)
Now consider their tendencies:
X (Carbon): Has 4 valence electrons → Tends to form covalent bonds, not ionic.
Y (Fluorine): Has 7 valence electrons → Needs 1 electron → very electronegative → typically gains electrons.
Z (Lithium): Has 1 valence electron → Easily loses it to form Li⁺ → typical metal.
Ionic bond: Occurs between metal (electron donor) and non-metal (electron acceptor).
Z (Li) can donate 1 electron.
Y (F) can accept 1 electron.
So, Z and Y can form an ionic compound:
LiF → ZY
Correct answer: b) ZY