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Bio Intro To Biochem

how many naturally occurring elements are there that serve as the building blocks of matter

92

all atoms of the same element have the same number of protons but the number of neutrons can vary

isotope

what's an isotope

an atom with a different number of neutrons

what is an organic molecule

something that is carbon based

what is an intramolecular force

a force occurring between atoms within a molecule

what bonds are formed within a molecule during intermolecular force

bonds with a molecules are covalent

what is a covalent bond

covalent bonds are formed when valence electrons are shared between two atoms

what is electronegativity

how strong the nucleus can attract an electron

what is an intermolecular force

it's much weaker than an intramolecular force and it happens between molecules, it determines how molecules interact

what are the two types of intermolecular forces

hydrogen bonding and hydrophobic interactions

what is hydrogen bonding

a hydrogen bond occurs between an atom with a partial negative charge and an atom was a partial positive charge

what is a stronger Bond a hydrogen bond or covalent bond

a hydrogen bond is much weaker than a covalent bond

what is a hydrophobic interaction

when nonpolar molecules interact with polar molecules they form clumps rather than mix because nonpolar molecules do not form hydrogen bonds

what type of molecules are hydrophobic (water hating)

nonpolar molecules

what type of molecules are hydrophilic (water-loving)

polar molecules

is an ion

when an atom or group of atoms gains or loses an electron it becomes an atom

what happens to water when it freezes

when water freezes it expands and becomes less dense so the Frozen part floats to the top allowing the fish and other species living in the water to continue living

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