BSC 1005 Lecture Notes - Lecture 2: Atomic Nucleus, Mass Number, Atomic Number
Document Summary
Biology chapter 2 outline: life"s chemical basis 8/28/17. Atom, element, molecule, compound, subatomic particles, ion, isotope, orbitals, bonds, ph. Ma tte r is a nything tha t ta ke s up s pa ce a nd ma s s . Ma tte r is compos e d of e le me nts . An e le me nt is a s ubs ta nce tha t ca n not be broke n down to othe r s ubs ta nce s . Out of 94 na tura lly occurring e le me nts , a bout 25 a re e s s e ntia l for life . Exa mple s : ca rbon, nitroge n, s odium, gold e tc. The mos t a bunda nt e le me nts in living orga nis ms a re ca rbon, hydroge n a nd oxyge n.
