Group 7 element

From Free net encyclopedia

Group	7
Period
4	25  Mn
5	43  Tc
6	75  Re
7	107  Bh

A Group 7 element is the series of elements in group 7 (IUPAC style) in the periodic table, which consists of the transition metals manganese (Mn), technetium (Tc), rhenium (Re), and bohrium (Bh).

All of these elements are classed in Group 7 because their valence shell holds four electrons. Technetium has no stable isotopes. Technetium, and promethium, are the only two such elements before polonium, after which no known element has a stable isotope.

Explanation of right side periodic table slice:

Transition metals

atomic number in red are gases

atomic number in black are solids

solid borders are older than the Earth (Primordial elements)

dotted borders are made artificially (Synthetic elements)

dashed borders have no isotopes older than the earth

Periodic tables
Standard table | Vertical table | Table with names | Names and atomic masses (large) | Names and atomic masses (small) | Names and atomic masses (text only) | Inline F-block | Elements to 218 | Electron configurations | Metals and nonmetals | Table by blocks
Lists of elements
Name | Atomic symbol | Atomic number | Boiling point | Melting point | Density | Atomic mass
Groups:   1 -  2 -  3 -  4 -  5 -  6 -  7 -  8 -  9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18
Periods:  1  -  2  -  3  -  4  -  5  -  6  -  7  -  8  -  9
Series:   Alkalis  -  Alkaline earths  -  Lanthanides  -  Actinides  -  Transition metals  -  Poor metals  -  Metalloids  -  Nonmetals  -  Halogens  -  Noble gases
Blocks:  s-block  -  p-block  -  d-block  -  f-block  -  g-block

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