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Atomic #: 42
# of protons: 42
# of electrons: 42
# of neutrons: 54
Atomic mass: 95.94
Electron configuration: [kr]4d^5 5s^7
Electrons per shell: 2,8,18,13,1
Solid at room temperature
Melting point

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Atomic Number: 27
Atomic Mass: 58.933195
Electron Configuration: [Ar] 3d7 4s2
Discovered: 1738
- brittle, hard, silver-grey transition metal with magnetic properties similar to those of iron

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Electron Configuration of Transition Metals

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ChemWiki Elemental Minute: Cobalt (Physical Properties)

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Atomic number: 51
Atomic weight: 121.760
Electron config[Kr] 4d^10 5s^2 5p^3
per shell 2, 8, 18, 18, 5

Physical properties

Solid

Melting Point 903.78 K ​(630.63 °C, ​1167.13 °F)

Boiling point 1908 K ​(1635 °C, ​2975 °F)

Density 6.697 g/cm^3

when liquid, at m.p. | 6.53 g/cm^3

Heat of fusion 19.79KJ/Mol

Heat of vaporization 193.43 kJ/mol

Molar heat capacity 25.23 J/(mol·K)

Atomic properties

Oxidation states 5, 4, 3, 2, 1, −1, −2, −3 ​

Electronegativity Pauling scale: 2.05

Ionization energies 1st: 834 kJ/mol

2nd: 1594.9 kJ/mol

3rd: 2440 kJ/mol

Atomic radius empirical: 140 pm

Speed of sound 3420 m/s (at 20 °C)

Thermal expansion 11 µm/(m·K) (at 25 °C)

Thermal conductivity 24.4 W/(m·K)

Electrical resistivity | 417 nΩ·m (at 20 °C)

# data[].attributes.body
Atomic#: 54
Proton#: 54
Electron#: 54
Neutron#: 77
Atomic Mass: 131.293
Electron Formula: [Kr]4d^105s^25
Noble gas
In all of period six's electron formula

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Atomic #: 19
Atomic symbol: K
Atomic mass
# of Protons: 19
# of Electrons: 19
# of neutrons: 20
Electron configuration: [Ar] 4s^1
Elections per shell: 2,8,8,1
Solid at room temperature
Melting point: 336.7k(63 degrees Celsius, 146.3 degrees Fahrenheit)
Boiling point: 1032k( 759 degrees Celsius, 1398 degrees Fahrenheit)
Density: 0.862 g/cm^3
Heat of fusion: 2.33 kj/mol
Heat of vaporization: 76.9 kj/mol
Oxidation states: +1,-1(a strongly basic oxide)
Electronegativity: Pauling scale - 0.82
Ionization energies: 1st 418.8 kj/mol, 2nd 3052 kj/mol, 3rd 4420 kj/mol

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4d^105s^2
# of protons: 48
# of neutrons: 64
# of electrons: 48

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3d^104s^24p^4
# of protons:34
# of electrons:34
# of neutrons:45
Density 4.79 g/cm^3
Mass: 78.96

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Metalloid
Atomic Symbol:
Atomic Number: 5
Atomic Mass: 10.811
Electron Configuration: [He] 2s^2 2p^1
Phase: Solid
Density: 2.37 g/cm^3
Melting Point: 3769°F
Discovered in 1808 by Joseph Louis Gay-Lussac and Louis Jacques

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Atomic mass= 107.8682
Transition metal
[Kr] 4d^10 5s^1
Density= 10.49 g.cm^3

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Transition Metal
Atomic Symbol: Ni
Atomic Number: 28
Atomic Mass: 58.6934
Electron Configuration: [Ar] 3d^8 4s^2
Phase: Solid
Density: 8.908 g/cm^3
Melting Point: 2651°F
Discovered in 1751 by Axel Fredrik Cronstedt

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Atomic#:

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Atomic Symbol: Ni
Atomic Number: 28
Atomic Mass: 58.6934
Electron Configuration: [Ar] 3d^8 4s^2
Phase: Solid

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Symbol : Cu
Atomic # = 26  Group  11 , Period 4 Element Type : Transition Metal  Atomic Mass : 63.546
Discovery : 9000 BC     Electron Configuration :  3d^10 4s^1               Melting Point : 1357.77 K ​(1084.62 °C, ​1984.32 °F)         Boiling Point : 2835 K ​(2562 °C, ​4643 °F)

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Here's a new video about copper, including a nice demonstration and some stories from The Professor. (We kept one older story from the original video because it was too interesting) More chemistry videos at http://www.periodicvideos.com/ Follow us on Twitter at http://twitter.com/periodicvideos Or on Facebook at http://www.facebook.com/pages/The-Periodic-Table-of-Videos-Fan-Page/298533639961

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Symbol: C
Atomic # = 6      Group 14, Period 2  Element Type : Nonmetal             Atomic Mass : 12.0107        Discovered : 3750 BC   Electron Configuration:  [C] 1s^2 2s^2 2p^2

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Symbol: In
Atomic Number: 49
Group 13, Period 5
Element Type: Post-Transition Metal
Atomic Mass: 114.818
Discovered: 1863
Electron Configuration: 4d¹º5s²5p¹
State at 25°C: Solid
Density: 7.31g/cm³
Electronegativity: 1.78p
Isotopes: {Indium-113: 4.28%, Indium-115: 95.72%%}
Image of Indium

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Discovery date:1898. Discovered by:Sir William and Morris Travers. The name is derived from the Greek 'Kryptos' meaning hidden. Group 18. Period 4. Block p. Atomic number:36. Gas. Melting point:-157.37 degrees Celsius Boiling point: -153.415 degrees Celsius. Relative atomic mass : 83.798

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Discovery date:1825. Discovered by Hand Oersted. The name is derived from the Latin name for alum, 'alumen' meaning bitter salt. Group 13. Period 3. Block p. Atomic number:13. Solid Melting Point:660,323 degrees Celsius. Boiling point: 2,519 degrees Celsius. Relative atomic mass:26.982. Low density. High strength. Superior malleability. Excellent corrosion resistance. Good thermal and electrical conductivity.

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Symbol: Rb
Atomic Number: 37
Group 1, Period 5
Element Type: Alkali Metal
Atomic Mass: 85.468
Discovered: 1861
Electron Configuration: 5s
State at 25°C: Solid
Density: 1.532g/cm³
Electronegativity: 0.82p
Isotopes: {Rubidium-85: 72.17%, Rubidium-87: 27.83%}

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Jake Dickerman (jake_dickerman) is a beautiful person

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See all the wonderful things Jake Dickerman has made

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Atomic number: 24
Protons: 24
Electron Configuration: 3d^5  4s^1
Atomic mass: 51.996
Melting point: 3,465  F
Boiling point: 4,841  F
Solid at room temperature
Density: 7.15 cm^3
Neutrons: 28

Discovered in 1797

Since chromium is a metal it is used for reducing the oxide with aluminum

Chromium gives glass an emerald green color

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Atomic Number: 4
Atomic Mass: 9.01218
Electron Configuration: [He] 2s^2
Discovered in 1798
- Gray metal, stronger than steel & lighter than aluminum.
Used industrially in three forms:
-as a pure metal
- as beryllium oxide
- most commonly, as an alloy with copper, aluminum, magnesium, or nickel.

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ChemWiki Elemental Minute: Beryllium (Chemical Properties)

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Atomic Number: 53
Atomic Symbol: I
Average Atomic Mass:
126.90447
[Kr] 4d10 5s2 5p5

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Atomic Number: 31
Atomic Symbol: Ga
Average Atomic Mass:
69.723
[Ar] 3d10 4s2 4p1

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Symbol: Si
Latin "silex", or flint
Atomic Number: 14
Group 14, Period 3
Element Type: Metalloid
Atomic Mass: 28.085
Discovered: 1823
Electron Configuration: [Ne] 3s²3p²
State at 25°C: Solid
Density: 2.329g/cm³
Electronegativity: 1.90p
Isotopes: {Silicon-28: 92.2%, Silicon-29: 4.7%, Silicon-30: 3.1%}

# data[].attributes.body
Atomic#:35
Proton#:35
Electron#:35
Neutron#: 45
Atomic Mass: 79.904
Electron configuration:
[Ar]4d^104s^24p^5
Halogen

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#Of Protons: 3
#Of Neutrons: 4
#Of Electrons:

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atomic# 101.07
[Kr]4d^7 5s^1
Density : 12.2 g/cm^3

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Atomic mass= 106.42
[Kr] 4d^10
Density=12.023 g.cm^3

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Atomic#: 12
Proton#:12
Electron#: 12
Neutron#: 12
Group#: 2
Period#: 3
Atomic Mass: 24.3050
Electron Formula:
[Ne]3s^2

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Atomic Number: 25
Atomic Symbol: Mn
Average Atomic Mass: 54.938049
[Ar]3d^5 4s^1
Density: 7.43 gcm-3 at 20°C
Melting point: 1247 °C
Boiling point: 2061 °C
Discovered: 1774

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Mass:40.078 u ± 0.004 u

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Mass: 22.9898
Electron configuration: 3s^6
# of protons: 11
# of electrons: 11
# of neutrons: 12

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Atomic mass:14.0067
Atomic number:7
Electron configuration: 1s^2 2s^2 2p^3
Electron per shell: 2,5

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Mass: 40.078 u ± 0.004 u
Atomic#: 20
# of protons: 20
# of electrons: 20
# of neutrons: 20
Melting point: 839.0° C
Boiling point: 1484.0° C
Density: 1.55 grams per cubic centimeters.
Normal phase: Solid
Family: Alkaline earth metals

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Atomic Number: 8
Atomic Symbol: O
Average Atomic Mass:
15.9994
[He] 2s^2 2p

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# of protons=15
# of electrons=15
# of neutrons= 16
Atomic #=15
Atomic mass=30.9738

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Reaction of Water with Phosphorus Pentachloride

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Uploaded by Science Skool on 2016-01-21.

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mass# 44.9559
[Ar]3d^1 4s^2
Density : 2.985 g/cm^

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Symbol: Ge
Atomic Mass: 72.63
Atomic Number: 32
Electron Configuration:  [Ar] 3d^10 4s^2 4p^2
Density: 5.5
Boiling Point: 5,131°F (2,833°C)
Melting Point: 1,721°F (938.2°C)
Discovered: 1886

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Atomic mass=50.9414
[Ar]3d^3 4s^2
Density=6.1g.cm^-3

# data[].attributes.body
atomic number:41
mass=92.9064
[Kr]4d^45^1
Density=8.57
Protons: 41
Physical properties
Solid
Melting point 2750 K ​(2477 °C, ​4491 °F)
Boiling point 5017 K ​(4744 °C, ​8571 °F)
Density near r.t. 8.57 g/cm3
Heat of fusion 30 kJ/mol
Heat of vaporization 689.9 kJ/mol
Molar heat capacity 24.60 J/(mol·K)
vapor pressureP (Pa) 1 | 10 | 100 | 1 k | 10 k | 100 k
at T (K) | 2942 | 3207 | 3524 | 3910 | 4393 | 5013
Atomic properties
Oxidation states 5, 4, 3, 2, 1, −1, −3 ​(a mildlyacidic oxide)
Electronegativity Pauling scale: 1.6
Ionization energies 1st: 652.1 kJ/mol
2nd: 1380 kJ/mol
3rd: 2416 kJ/mol
Atomic radius empirical: 146 pm
Covalent radius 164±6 pm

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Symbol: F
Atomic Mass: 18.998
Atomic Number: 9
Electron Configuration: [He] 2s2^ 2p^5
Density: 1.696
Boiling Point: -306.6°F (-188.1°C)
Melting Point: -363.3°F (-219.6°C)
Discovered: 1886

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Atomic mass=39.948
[Ne]3s^2p^6
Density=1.78
Protons:
Physical properties
Gas
Melting point  83.81 K (−189.34 °C, ​−308.81 °F)
Boiling point 87.302 K ​(−185.848 °C, ​−302.526 °F)
Density at stp(0 °C and 101.325 kPa) 1.784 g/L
when liquid, at b.p. | 1.3954 g/cm3
Triple point 83.8058 K, ​68.89 kPa[2]
Critical point 150.687 K, 4.863 MPa[2]
Heat of fusion 1.18 kJ/mol
Heat of vaporization 6.53 kJ/mol
Molar heat capacity 20.85[3] J/(mol·K)

# data[].attributes.body
Atomic Number: 2
Atomic Symbol: He
Average Atomic Mass: 4.002602
1s^2
Boiling point: -268.9°C (-452.0°F)
Melting point:
- 272.2 (26 atm) °C
Density: 0.178*10-3 gcm -3at 20 °C
Discovered: 1895