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rhenium

(Encyclopedia) rheniumrheniumrēˈnēəm [key], metallic chemical element; symbol Re; at. no. 75; at. wt. 186.207; m.p. about 3,180℃; b.p. about 5,625℃; sp. gr. 21.02 at 20℃; valence −1, +2, +3, +4, +5…

Periodic Table of the Elements: Actinium

(Encyclopedia) Periodic Table of the Elements: Actinium Atomic Number: 89 Atomic Symbol: Ac Actinium Atomic Weight: (227) Electron Configuration: 2 · 8 · 18 32 · 18 9 · 2

Periodic Table of the Elements: Aluminum

(Encyclopedia) Periodic Table of the Elements: Aluminum Atomic Number: 13 Atomic Symbol: Al Aluminum Atomic Weight: 26.98154 Electron Configuration: 2 · 8 · 3

Periodic Table of the Elements: Americium

(Encyclopedia) Periodic Table of the Elements: Americium Atomic Number: 95 Atomic Symbol: Am Americium Atomic Weight: (243) Electron Configuration: 2 · 8 · 18 32 · 25 8 · 2

Periodic Table of the Elements: Antimony

(Encyclopedia) Periodic Table of the Elements: Antimony Atomic Number: 51 Atomic Symbol: Sb Antimony Atomic Weight: 121.760 Electron Configuration: 2 · 8 · 18 18 · 5

Periodic Table of the Elements: Argon

(Encyclopedia) Periodic Table of the Elements: Argon Atomic Number: 18 Atomic Symbol: Ar Argon Atomic Weight: 39.948 Electron Configuration: 2 · 8 · 8

Periodic Table of the Elements: Arsenic

(Encyclopedia) Periodic Table of the Elements: Arsenic Atomic Number: 33 Atomic Symbol: As Arsenic Atomic Weight: 74.92160 Electron Configuration: 2 · 8 · 18 · 5

Periodic Table of the Elements: Astatine

(Encyclopedia) Periodic Table of the Elements: Astatine Atomic Number: 85 Atomic Symbol: At Astatine Atomic Weight: (210) Electron Configuration: 2 · 8 · 18 32 · 18 · 7

Periodic Table of the Elements: Barium

(Encyclopedia) Periodic Table of the Elements: Barium Atomic Number: 56 Atomic Symbol: Ba Barium Atomic Weight: 137.327 Electron Configuration: 2 · 8 · 18 18 · 8 · 2

Periodic Table of the Elements: Berkelium

(Encyclopedia) Periodic Table of the Elements: Berkelium Atomic Number: 97 Atomic Symbol: Bk Berkelium Atomic Weight: (247) Electron Configuration: 2 · 8 · 18 32 · 27 8 · 2