SCH4U Unit 1 test Questions with complete solution 2025

SCH4U Unit 1 test Questions with
complete solution 2025
VSEPR theory - correct answer valence shell electron pair repulsion theory


Vsepr shapes: 4 shared pairs 0 lone - correct answer tetrahedral


Vsepr shapes: 3 shared pairs 0 lone - correct answer trigonal planar


Vsepr shapes: 3 shared pairs 1 lone - correct answer trigonal pyramidal


Vsepr shapes: 2 shared pairs 2 lone - correct answer bent


Vsepr shapes: 5 shared pairs 0 lone - correct answer trigonal bypyramidal


Vsepr shapes: 6 shared pairs 0 lone - correct answer octahedran


vsepr shapes: 3 shared pairs 2 lone - correct answer t-shaped


Vsepr shapes: 4 shared pairs 1 lone - correct answer seesaw


Vsepr shapes: 2 bonding 0 lone - correct answer linear


Vsepr shapes: 5 shared pairs 1 lone - correct answer square pyramidal


Vsepr shapes: 4 shared pairs 2 lone - correct answer square planar

, metallic crystal properties - correct answer -shiny
-silvery
-flexible
-electrical conductivity
-thermal conductivity
-hardness varies
-melting points vary


electron sea model (metallic crystal) - correct answer -low ionization energy
due to loosely held electrons
-empty valence orbitals due to electron mobility
-attraction of positive nuclei to electron sea (non directional bonding)


molecular crystals - correct answer -solid states of elements
-low melting points
-not very hard
-non conductors in their pure form and in solution
-crystal lattice like ionic, but arrangement is more complex


covalent network crystals - correct answer -not very hard
-brittle
-very high melting points
-insoluble
-nonconductors of electricity
-held together by covalent bonds