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  2. Transition metal - Wikipedia

    en.wikipedia.org/wiki/Transition_metal

    In an alternative three-way scheme, groups 3, 4, and 5 are classified as early transition metals, 6, 7, and 8 are classified as middle transition metals, and 9, 10, and 11 (and sometimes group 12) are classified as late transition metals. The heavy group 2 elements calcium, strontium, and barium do not have filled d-orbitals as single atoms ...

  3. Group 4 element - Wikipedia

    en.wikipedia.org/wiki/Group_4_element

    Group 4 is the second group of transition metals in the periodic table. It contains only the four elements titanium (Ti), zirconium (Zr), hafnium (Hf), and rutherfordium (Rf). The group is also called the titanium group or titanium family after its lightest member.

  4. Group 3 element - Wikipedia

    en.wikipedia.org/wiki/Group_3_element

    Group 3 is the first group of transition metals in the periodic table. This group is closely related to the rare-earth elements. It contains the four elements scandium (Sc), yttrium (Y), lutetium (Lu), and lawrencium (Lr). The group is also called the scandium group or scandium family after its lightest member.

  5. Block (periodic table) - Wikipedia

    en.wikipedia.org/wiki/Block_(periodic_table)

    Most or all of these elements are also known as transition metals because they occupy a transitional zone in properties, between the strongly electropositive metals of groups 1 and 2, and the weakly electropositive metals of groups 13 to 16. Group 3 or group 12, while still counted as d-block metals, are sometimes not counted as transition ...

  6. Group (periodic table) - Wikipedia

    en.wikipedia.org/wiki/Group_(periodic_table)

    An exception is the "iron group", which usually refers to group 8, but in chemistry may also mean iron, cobalt, and nickel, or some other set of elements with similar chemical properties. In astrophysics and nuclear physics , it usually refers to iron, cobalt, nickel, chromium , and manganese .

  7. Names for sets of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Names_for_sets_of_chemical...

    Noble metals – Variously-defined group of metals that are generally resistant to corrosion. Usually includes Ag, Au, and the platinum-group metals. Non-ferrous metals - Metals or alloys that do not contain iron in appreciable amounts. Platinum group – Ru, Rh, Pd, Os, Ir, Pt. Post-transition metals – The metals coming after the transition ...

  8. Binary compounds of silicon - Wikipedia

    en.wikipedia.org/wiki/Binary_compounds_of_silicon

    3 Transition and inner transition metals. 4 Group 13. ... gold and the group 12 elements. ... Since degenerate semiconductors exhibit some metallic properties, ...

  9. Valence electron - Wikipedia

    en.wikipedia.org/wiki/Valence_electron

    So as opposed to main-group elements, a valence electron for a transition metal is defined as an electron that resides outside a noble-gas core. [3] Thus, generally, the d electrons in transition metals behave as valence electrons although they are not in the outermost shell.