The energy required to remove the outermost electron from an atom is called

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Multiple Choice

The energy required to remove the outermost electron from an atom is called

Explanation:
Energy required to remove the outermost electron from an atom is called ionization energy. It measures how strongly the nucleus holds onto its electrons in the gas phase; the first ionization energy refers to removing the first electron. This is distinct from electronegativity, which describes how an atom attracts electrons in a bond; from atomic radius, which is the size of the atom; and from valence electrons, which are the electrons in the outer shell. Ionization energy tends to rise across a period and fall down a group because of increasing effective nuclear charge across a period and greater shielding down a group.

Energy required to remove the outermost electron from an atom is called ionization energy. It measures how strongly the nucleus holds onto its electrons in the gas phase; the first ionization energy refers to removing the first electron. This is distinct from electronegativity, which describes how an atom attracts electrons in a bond; from atomic radius, which is the size of the atom; and from valence electrons, which are the electrons in the outer shell. Ionization energy tends to rise across a period and fall down a group because of increasing effective nuclear charge across a period and greater shielding down a group.

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