Flashcards in Chemistry Fundamentals Deck (10)
Major elements of the human body are...
Oxygen, Carbon, Hydrogen, Nitrogen
homogeneous mixtures of components
heterogeneous mixtures; visible solutes might settle out (ex. blood and cytoplasm)
heterogeneous mixtures; solutes remain in suspension (ex. plasma and cytosol)
Explain ionic bonds...
the transfer of electrons between atoms; form crystals; anions gained, cations lost an electron (ex. NaCl)
Explain covalent bonds...
the sharing of two or more electrons; form molecules; non polar molecules share equally, polar unequally
Explain hydrogen bonds...
weak, intramolecular bonds; give molecules three-dimensional shape (ex. in water)
Synthesis, decomposition and exchange reactions differ in that...
Synthesis involve bond formation; Decomposition involve bonds breaking; Exchange involve both (like a swap)
Exergonic reactions vs. Endergonic reactions
Exergonic reactions release energy and increase surrounding temperature; Endergonic reactions consume energy and decrease surrounding temperature