Periodic arrangement and trends Arrangement of the elements. The columns of the periodic table, which contain elements that show a family resemblance, are called groups.All members of a particular group have analogous outermost (valence) electron configurations, suggesting that all members of a group should show a family relationship in the types and numbers of the chemical bonds that they are ...
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A period 1 element is an element in the first period (row) of the periodic table.The periodic table is arranged in rows to show repeating properties of the elements. When the atomic number increases, the element have different properties.
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d-block elements are elements in which the last electron to be added to the atom using the Aufbau Principle is in a d orbital. The first series of these contains the elements from scandium to zinc, which at GCSE you probably called transition elements or transition metals. The terms "transition element" and "d-block element" don't quite have ...
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The d-block contraction (sometimes called scandide contraction) is a term used in chemistry to describe the effect of having full d orbitals on the period 4 elements. The elements in question are gallium, germanium, arsenic, selenium, bromine, and krypton .
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Trends in First Ionization Energy (Ionisation Energy) in Groups of the Periodic Table. As you go down a Group in the Periodic Table from top to bottom, the electron being removed occupies a higher energy level and is therefore further away from the nucleus.
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