Group 8 (in Swedish: Grupp 8) was a feminist movement in Sweden, founded by eight women in Stockholm in 1968. The organization took up various issues, such as demands for expansions of kindergartens, 6-hour working day, equal pay for equal work and opposition to
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A group, also known as a family, is a vertical column in the periodic table of the chemical elements. There are 18 groups in the standard periodic table.

The modern explanation of the pattern of the periodic table is that the elements in a group have similar
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Periods:]] 1 2 3 4 5 6 7 8
Series Alkalis Alkaline earths Lanthanides Actinides Transition metals Poor metals Metalloids Nonmetals Halogens Noble gases
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A period 4 element is one of the chemical elements in the fourth row (or period) of the periodic table of the elements.

These are: Chemical elements in the fourth period
Group 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Atomic number
Name 19
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3, 4, 6
(amphoteric oxide)
Electronegativity 1.83 (Pauling scale)
Ionization energies
(more) 1st: 762.5 kJmol⁻¹
2nd: 1561.9 kJmol⁻¹
3rd: 2957 kJmol⁻¹

Atomic radius 140 pm
Atomic radius (calc.
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A period 5 element is one of the chemical elements in the fifth row (or period) of the periodic table of the elements.

These are: Chemical elements in the fifth period
Group 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
#
Name 37
Rb 38
Sr 39
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4, 6, 8
(mildly acidic oxide)
Electronegativity 2.2 (scale Pauling)
Ionization energies 1st: 710.2 kJ/mol
2nd: 1620 kJ/mol
3rd: 2747 kJ/mol
Atomic radius 130 pm
Atomic radius (calc.
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A period 6 element is one of the chemical elements in the sixth row (or period) of the periodic table of the elements, including the lanthanides.

These are: Chemical elements in the sixth period
Group 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
#
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4, 3, 2, 1, −1, −2
(mildly acidic oxide)
Electronegativity 2.2 (scale Pauling)
Ionization energies 1st: 840 kJ/mol
2nd: 1600 kJ/mol
Atomic radius 130 pm
Atomic radius (calc.
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A period 7 element is one of the chemical elements in the seventh row (or period) of the periodic table of the elements.

This period contains the heaviest element which occurs naturally on earth, uranium.
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Hassium (IPA- /ˈhasiəm/) is a synthetic element in the periodic table that has the symbol Hs and atomic number 108.
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A group, also known as a family, is a vertical column in the periodic table of the chemical elements. There are 18 groups in the standard periodic table.

The modern explanation of the pattern of the periodic table is that the elements in a group have similar
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chemical element, or element, is a type of atom that is defined by its atomic number; that is, by the number of protons in its nucleus. The term is also used to refer to a pure chemical substance composed of atoms with the same number of protons.
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A group, also known as a family, is a vertical column in the periodic table of the chemical elements. There are 18 groups in the standard periodic table.

The modern explanation of the pattern of the periodic table is that the elements in a group have similar
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The International Union of Pure and Applied Chemistry (IUPAC) (IPA: [aɪ ju pæk]) is an international non-governmental organization established in 1919 devoted to the advancement of chemistry.
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The periodic table of the chemical elements is a tabular method of displaying the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869.
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In chemistry, the term transition metal (sometimes also called a transition element) has two possible meanings:

• It commonly refers to any element in the d-block of the periodic table, including zinc, cadmium and mercury.

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3, 4, 6
(amphoteric oxide)
Electronegativity 1.83 (Pauling scale)
Ionization energies
(more) 1st: 762.5 kJmol⁻¹
2nd: 1561.9 kJmol⁻¹
3rd: 2957 kJmol⁻¹

Atomic radius 140 pm
Atomic radius (calc.
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4, 6, 8
(mildly acidic oxide)
Electronegativity 2.2 (scale Pauling)
Ionization energies 1st: 710.2 kJ/mol
2nd: 1620 kJ/mol
3rd: 2747 kJ/mol
Atomic radius 130 pm
Atomic radius (calc.
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4, 3, 2, 1, −1, −2
(mildly acidic oxide)
Electronegativity 2.2 (scale Pauling)
Ionization energies 1st: 840 kJ/mol
2nd: 1600 kJ/mol
Atomic radius 130 pm
Atomic radius (calc.
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Hassium (IPA- /ˈhasiəm/) is a synthetic element in the periodic table that has the symbol Hs and atomic number 108.
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An electron shell, also known as a main energy level, is a group of atomic orbitals with the same value of the principal quantum number n. Electron shells are made up of one or more electron subshells, or sublevels
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In chemistry, the term transition metal (sometimes also called a transition element) has two possible meanings:

• It commonly refers to any element in the d-block of the periodic table, including zinc, cadmium and mercury.

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EARTH was a short-lived Japanese vocal trio which released 6 singles and 1 album between 2000 and 2001. Their greatest hit, their debut single "time after time", peaked at #13 in the Oricon singles chart.
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In geochemistry, Primordial elements are chemical elements found on the earth that have existed in their current form since before the earth was formed, according to accepted stellar evolution theory.
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In chemistry, the chemical elements labeled as synthetic are too unstable to be found naturally on Earth. These synthetic elements possess half-life so short, relative to the age of the Earth that any atoms of these elements that may have existed when the Earth formed have long
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The periodic table of the chemical elements is a tabular method of displaying the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869.
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Lanthanides   lanthanum
57
La cerium
58
Ce praseodymium
59
Pr neodymium
60
Nd promethium
61
Pm samarium
62
Sm europium
63
Eu gadolinium
64
Gd terbium
65
Tb dysprosium
66
Dy holmium
67
Ho erbium
68
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