what are the characteristics of f block elements?
233983
['They are heavy metals.', 'They generally have high melting and boiling points.', 'They exhibit variable oxidation states.', 'They form coloured ions.', 'They have the tendency to form complex compounds.', 'Actinoids are radioactive in nature.']
686589
['Element Groups. Groups are the columns of the table. ... ', 'Element Periods. The rows in the periodic table are called periods. ... ', 'Ionic Bonds. Ionic bonds form between atoms with very different electronegativity values. ... ', 'Covalent Bonds. Atoms share electrons in covalent bonds. ... ', 'Metallic Bonds.']
464322
['Conductivity.', 'Corrosion Resistance.', 'Density.', 'Ductility / Malleability.', 'Elasticity / Stiffness.', 'Fracture Toughness.', 'Hardness.', 'Plasticity.']
625726
Lanthanides: Properties and Reactions. The Lanthanides consist of the elements in the f-block of period six in the periodic table. While these metals can be considered transition metals, they have properties that set them apart from the rest of the elements.
427508
['Color.', 'Streak.', 'Hardness.', 'Cleavage or Fracture.', 'Crystalline Structure.', 'Diaphaneity or Amount of Transparency.', 'Tenacity.', 'Magnetism.']
516251
['Elements. ... ', 'Melting and Boiling Points (increases down the group)', 'Atomic Radius (increases down the group)', 'Ionization Energy (decreases down the group)', 'Electronegativity (decreases down the group)', 'Electron Affinity (decreases down the group)', 'Reactivity of Elements (decreases down the group)']
91795
['Low melting points and boiling points. ... ', 'Low enthalpies of fusion and vaporization These properties are usually one or two orders of magnitude smaller than they are for ionic compounds.', 'Soft or brittle solid forms. ... ', 'Poor electrical and thermal conductivity.']
1057680
Explanation: The d-block elements are the outer transition elements as opposed to the f-block, which are the inner transition elements. The inner transition elements are part of group 3, and are the elements with atomic numbers 57−71 in period 6, and the elements with the atomic numbers 89−103 in period 7.
15156
['they are good conductors of heat and electricity.', 'they can be hammered or bent into shape easily.', 'they have high melting points (but mercury is a liquid at room temperature)', 'they are usually hard and tough.', 'they have high densities.']
110435
due to poor shielding effect of d block and f block ( it means due to poor contraction of d block ) electrons in the s orbital are more strongly held in upper period of same group. So s electrons are inert and can not be removed and give valency of 4. Hence Pb forms 2 ions instead of 4 and PbCl2 becomes stable.
491936
The elements belonging to the f block are further differentiated into: The first series of elements are called lanthanides and include elements with atomic numbers beginning from 57 and ending at 71. These elements are non-radioactive (except for promethium, which is radioactive).
1437548
The lanthanides and actinides are arranged below with a notation in the main body cell rather than making room for all these elements in the 3B group in the main body of the periodic table. Because of the f shell electrons, these two element groups are also known as the f-block elements.
951585
['Hardness and crystal structure.', 'Toughness.', 'Optical properties.', 'Electrical properties.', 'Thermal conductivity.', 'Thermal stability.', 'See also.', 'References.']
126102
['They are solid (with the exception of mercury, Hg, a liquid).', 'They are shiny, good conductors of electricity and heat.', 'They are ductile (they can be drawn into thin wires).', 'They are malleable (they can be easily hammered into very thin sheets).']
571110
['Chemical composition.', 'Atomic bonding.', 'Corrosion resistance.', 'Acidity or Alkalinity.']
425148
Electronic Configuration of D Block Elements D block Elements have a general electronic configuration of (n-1)d 1-10ns 1-2. These elements can find stability in half-filled orbitals and completely filled d orbitals.
839431
['It is a hard ferromagnetic, silver-white, lustrous, brittle element.', 'It is stable in air and does not react with water.', 'Like other metals, it can also be magnetized.', 'With dilute acids, it reacts slowly.', 'The metal melts at 1495 °C and boils at 2927 °C.']