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The electronic configurations of the elements in group 1: The atoms of all group 1 elements have similar chemical properties and reactions because they all have one electron in their outer shell.
The reaction of group 2 metals with oxygen follows the following general equation: 2M (s) + O2 (g) → 2MO (s) Where M is any metal in group 2. We can see this is a redox reaction by looking at the changes in oxidation number of the metal, M, and oxygen. M = 0 → +2 so the metal has been oxidised. O = 0 → -2 so the oxygen has been reduced.
List of Elements by Group and Period. List of elements of the periodic table by group and period including the chemical symbol and the atomic number. To list the elements order by group and period, click on the table headers. You can print the list of elements by hitting the print button below.
Sep 20, 2022 · There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements. Periods 4 and 5 have 18 elements. Periods 6 and 7 have 32 elements, because the ...
Sep 1, 2024 · There are total 18 different groups in Periodic table. Group 1: Alkali metals group (hydrogen not included) Group 2: Alkaline earth metals group. Group 3-12: Transition and Inner transition metals group. Group 13: Boron group. Group 14: Carbon group. Group 15: Nitrogen group.
The atomic and ionic radii of Group 2 elements increase down the group; this is due to an increased number of electron shells. The first ionisation energy decreases down the group because the outermost electrons are further from the nucleus and therefore less tightly bound. Solubility of hydroxides and sulphates in water varies down the group.
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Group 2 elements are s-block elements because their outermost electrons are in the s-orbital. They have two electrons in their outermost shell, leading to their tendency to lose two electrons in reactions to achieve a stable electron configuration. Group 2 elements are all metallic and shiny. They are generally harder than Group 1 metals, but ...
