hydrogen - The lightest element and at the same time the most abundant in outer space, nebula - The first stage of a star’s life cycle, helium - The second most abundant element in the universe, big bang theory - The most accepted theory about the formation of the universe that explains why it continues to expand, Mendeleev - Created a classification of elements based on their atomic weight, Electronegativity - The relative ability of a bonded atom to attract shared electron pairs, Tetrahedral - The molecular shape of CHBr3, London forces - Considered as the weakest IMFAs, Surface tension - This refers to the energy required to increase the surface area by a unit amount, ion-dipole - The strongest IMFAs force, Viscosity - The ability of these substances to resist flow i, nucleic acids - Biomolecular group carries and passes on the hereditary information of the organism, carbohydrates - Organic molecule gives fast source of energy, Lipids - nutrient group is used in the composition of waxes and responsible for insulation of some organisms, Enzyme - catalyst in the human body, Limiting Reactant - It is the reactant that produces a lesser amount of product., Excess Reagents - It is the reactants that are not used up when the reaction is finished, non-renewable - Energy that comes from sources that will run out or will not be replenished in our lifetimes—or even in many, many lifetimes, biomass - It refers to the organic matter from plants and animals (microorganisms)., detergent - type of cleaning products which many of the ingredients can be manufactured from plants.,

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