Materials that can return to their old shape after stretching are called:
Flexible material
Elastic material
Ductile metals
Non - elastic material
Metallic bond is due to the presence of
Cations
Anions
Mobile electrons
Atoms
When an element can exist in more than one structural form in the physical state, it is:
Isomerism
Allotropy
Isotropy
Anisotropy
V- shaped
Trigonal planar
Linear
Tetrahedral
Hot metal at high temperature is allowed to cool slowly, producing a large grain size. This process is called:
Tempering
Cooling
Querching
Annealing
The first systematic classification of elements was done by
Einstein
Niels Bohr
Mendeleev
Moseley
KNO3 is:
Potassium chloride
Potassium chloroxide
Potassium nitride
Potassium nitrate
Group VII elements are called
Noble gases
Transition elements
Alkali metals
Halogens
Mixtures of elements designed to have properties that are useful for a particular purpose
Compounds
Mixtures
Double salts
Alloys
Dry ice is :
Water
Solid Carbon dioxide
Silica
Quartz