Question

16) An atom with a valence structure of 1s 2el 2nf 3ed 3pf 4e 3d would behave most like a) Transition metal b) Alkal d Alkaline earth Part C) Multiple Choice (30 points, 3 pts each) d) Inert element e) Actinide n Isotropic 17) What statement below is true when comparing ideal HCP and FCC structures? al Elements with both are very ductile b) Atoms touch along the [100) directions c FCC metals have lower den d) None of the above are trues 18) in a FCC crystal, which plane has the highest planar density (PD)? a) (100) b) (110) c (111) d) (211) e) (200) n (221) 19) Assign the Bravais lattice type for the following unit-cell structure. a) Body Centered Cubic b) Body-Centered Orthorhombic c) Body-Centered Tetragonal d) Body-Centered Hexagonal 20) Which of the following is nota 2-dimensional imperfection a) Twin boundary b) Dislocation boundary c) Phase boundary d Grain boundary 21) An impurity atom positioned on normal lattice sites is called a(n) a) Isotope b) Vacancy site c) Substitutional atom d) Interstitial atom 22) The diffusion coefficient of carbon in FCC iron is lower than BCC iron because a) The temperature is higher for FCC b) FCC has a higher packing factor than BCC c) FCC is more cubic Carbon is substitutic d) 23) The elastic modulus of a material is an indication of its a) Hardness b) Resilience c) Ductility d) Stiffness 24) The number of vacancies in a metal such as copper a) increases exponentially with temperature b) increases linearly with temperature c) has a constant value for all temperatures d) has no relationship w e) can only be measur 25) Strength refers to the ability of a material to a) Bend before breaking b) Resist deformation by indentation c) Absorb energy microscope measur d) Withstand applied deformation e) Work harden

Answer 1

Ans 16 : a) transition metal

The last electron in the atom mentioned occupies 3d orbital. So the element most likely belongs to d block of the modern periodic table.

The elements of d-block are called as transition metals and hence this atom most likely behaves as same.