how many electrons are there in the outermost orbit of metal and non metals
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Explanation:
Elements in group 1 and group 2 are metals. Atoms of group 1 elements have one electron in their outer shell, and atoms of group 2 elements have two electrons in their outer shell.
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A full and stable outer shell of an electron consists of eight electrons. In chemistry, this is called the "octet rule". An atom will look to chemically combine with another atom to form a compound or a molecule if it has less than eight electrons. This can be done via either covalent or ionic bonding.
Elements having 4 or more valence(outer shell) electrons tend to behave like non metals and elements having 4 or less valence (outer shell) electrons tend to behave like metals.
Two non-metal tend to form covalent bonds by sharing electrons. An electron that is shared goes towards both of the atoms' octets.
When a metal and a nonmetal combine, an ionic bonds is created. It is easier for the metals, which have 4 or less electrons, to lose electrons. Metals lose all the valence electrons of their current outer shell. In this way, the shell directly beneath the previous shell becomes its full outer shell. Likewise, the nonmetals gain enough electrons from the metals to complete their octet.
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