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ନାମ, ପ୍ରତୀକ | americium, Am |
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Appearance | silvery white |
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ଉଚ୍ଚାରଣ | AM-ə-RIS-ee-əm |
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ପରମାଣୁ କ୍ରମାଙ୍କ (Z) | 95 |
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ଶ୍ରେଣୀ, ବ୍ଳକ | group n/a, f-block |
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ପର୍ଯ୍ୟାୟ | period 7 |
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ମୌଳିକ ପ୍ରକାର | actinide |
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ମାନକ ପରମାଣବିକ ଓଜନ (Ar) | (243) |
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ଇଲେକ୍ଟ୍ରୋନ୍ ବିନ୍ୟାସ | [Rn] 5f7 7s2 |
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per shell | 2, 8, 18, 32, 25, 8, 2 |
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ଅବସ୍ଥା | solid |
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ଗଳନାଙ୍କ | 1449 K (1176 °C, 2149 °F) |
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ସ୍ଫୁଟନାଙ୍କ | 2880 K (2607 °C, 4725 °F) |
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Density near r.t. | 12 g/cm3 |
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Heat of fusion | 14.39 kJ/mol |
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Molar heat capacity | 62.7 J/(mol·K) |
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pressure
P (Pa)
|
1
|
10
|
100
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1 k
|
10 k
|
100 k
|
at T (K)
|
1239
|
1356
|
|
|
|
| |
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Oxidation states | 7, 6, 5, 4, 3, 2 amphoteric oxide |
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Electronegativity | Pauling scale: 1.3 |
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Atomic radius | empirical: 173 pm |
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Covalent radius | 180±6 pm |
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Crystal structure | hexagonal |
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Thermal conductivity | 10 W/(m·K) |
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Electrical resistivity | 0.69[୧] µ Ω·m |
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Magnetic ordering | paramagnetic |
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CAS Number | 7440-35-9 |
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ଆବିଷ୍କାର | Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso (1944) |
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| references |