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RAJ RANJAN SINGH Grade: 11
        

WHICH HAS MAX HARDNESS


   NAF  AL2O3   MGF2 TIO2

7 years ago

Answers : (2)

ruchi yadav
askIITians Faculty
26 Points
										hardness depends upon d covalency or d covalent strength of d cov bonds. all hard substances r brittle because in d absence of ionicity d molecules slip easily. in case of polymers de r plastic because in dem thr is nothing apart frm d strong n higly durable covalent bonds


Thank You
Ruchi
Askiitians Faculty
3 years ago
Shubham Gupta
19 Points
										Al2O3 has maximum hardness Hardness of ionic compound directly proportional to lattice energy And lattice energy directly proportional to effective charge/radius ratio(Z+ * Z- /r+ + r-)
										
5 months ago
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