Molecule - ✔️✔️two or more atoms held together by covalent bonds.(smallest unit of most
compounds).
Element - ✔️✔️any of the more than 100 known substances (of which 92 occur naturally) that
cannot be separated into simpler substances and that singly or in combination constitute all
matter.
Compound - ✔️✔️to elements bonded together.
Acid - ✔️✔️compound that forms hydrogen ions (H+) in solution.
Base - ✔️✔️Comound that forms hydroxide ions (OH-) in solution.
pH - ✔️✔️a value that indicated the acidity or alkalinity of a solution on a scale of 0-14, based on
the proportion of H+ ions.
Protons - ✔️✔️positively charged particles in the nucleus of an atom.
Neutrons - ✔️✔️the particles of the nucleus that have no charge.
Electrons - ✔️✔️negatively charged particles found outside the nucleus.
Radioactive Isotopes - ✔️✔️nuclei are unstable in these atoms and they break down at a constant
rate over time.
Ionic Bond - ✔️✔️a bond formed by positive and negative ions.
Covelant Bond - ✔️✔️two atoms sharing electrons.
Adhesion - ✔️✔️water molecules adhere to polar surfaces.
Cohesion - ✔️✔️water molecules cling together with hydrogen bonds.
Universal Solevant - ✔️✔️waters ability to dissolve almost any substance.
Surface Tension - ✔️✔️a phenomenon at the surface of a liquid caused by intermolecular forces.
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