Biochemistry Actual Questions Verified

Biochemistry / Actual Questions & Verified Answers, / .

Matter - Answer: Anything that has mass and/or takes up space (volume)

Element - Answer: A substance that cannot be broken down into other substances by chemical reactions

Molecule - Answer: Any combination of atoms

Compound - Answer: Two or more different elements combined in a fixed ratio

Atom - Answer: Smallest unit of matter that retains the properties of an element

Atomic Number - Answer: Number of protons

Mass Number - Answer: Number of protons plus neutrons

Atomic Weight - Answer: 1 mole of a sustance = atomic weight in grams

Isotope - Answer: Atom with an abnormal number of neutrons

Proton - Answer: Positively charged subatomic particle

Neutron - Answer: Subatomic particle with no charge 1 / 2

Electron - Answer: Negatively charged subatomic particle

Valence Electron - Answer: Outermost electrons in an atom

Covalent Bond - Answer: Sharing of electrons (Two non-metals)

Ionic Bond - Answer: Electrostatic attraction of positive and negative ions (Metal and Non- metal)

Valence shell - Answer: An atom's outermost electron shell

Polar Covalent Bond - Answer: Unequal sharing of electrons due to difference in

electronegativity

Cation - Answer: Positively charged ion

Anion - Answer: Negatively charged ion

Hydrogen bond - Answer: Hydrogen atom covalently bonded to an electronegative atoms is attracted to another electronegative atom

Reactants - Answer: Starting materials in a reaction

Products - Answer: Ending materials in a reaction

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