Core electrons are the electrons in an atom that are not involved in chemical bonding and reside in the inner shells, closer to the nucleus. They effectively shield the valence electrons from the full positive charge of the nucleus, influencing properties like atomic size and ionization energy.

Core Electrons

Core electrons

electrons in an atom

Chemical bonding is the process by which atoms combine to form molecules and compounds, driven by the attainment of a more stable electronic configuration. The main types of chemical bonds are ionic, covalent, and metallic, each involving different mechanisms of electron sharing or transfer.

chemical bonding

inner shells

The nucleus is a membrane-bound organelle found in eukaryotic cells that serves as the control center, housing the cell's genetic material in the form of DNA. It regulates gene expression and mediates the replication of DNA during the cell cycle, playing a crucial role in growth, metabolism, and reproduction.

nucleus

Valence electrons are the outermost electrons of an atom and play a crucial role in determining its chemical properties and reactivity. They are involved in forming chemical bonds, such as covalent and ionic bonds, and dictate how atoms interact with each other in molecules and compounds.

valence electrons

positive charge of the nucleus

Atomic size refers to the distance from the nucleus of an atom to the outermost shell of electrons, influencing properties such as reactivity and bonding. It generally decreases across a period due to increased nuclear charge and increases down a group due to additional electron shells.

atomic size

Ionization energy is the amount of energy required to remove an electron from an isolated atom or ion in its gaseous state. It is a fundamental property that reveals the reactivity of elements, with higher ionization energies indicating a stronger hold on electrons and typically less reactivity.

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