Max Planck came up with quantum mechanics to explain why metal releases electrons when you shine a light at it, and why matter emits radiation. Quantum mechanics applies for very small things like the electrons, protons, and neutrons that make up an atom. People like Werner Heisenberg, Erwin Schrödinger, and Paul Dirac continued to work on quantum mechanics and eventually we got the Standard Model.
m æ k s WORD_BOUNDARY p l æ ŋ k WORD_BOUNDARY k eɪ m WORD_BOUNDARY ʌ p WORD_BOUNDARY w ɪ ð WORD_BOUNDARY k w ɔ n t ə m WORD_BOUNDARY m ɪ k æ n ɪ k s WORD_BOUNDARY t ʊ WORD_BOUNDARY ɛ k s p l eɪ n WORD_BOUNDARY w aɪ WORD_BOUNDARY m ɛ t ə l WORD_BOUNDARY ɹ ɪ l iː s ɪ z WORD_BOUNDARY ɪ l ɛ k t ɹ ɑ n z WORD_BOUNDARY w ɛ n WORD_BOUNDARY j uː WORD_BOUNDARY ʃ aɪ n WORD_BOUNDARY ʌ WORD_BOUNDARY l aɪ t WORD_BOUNDARY æ t WORD_BOUNDARY ɪ t WORD_BOUNDARY æ n d WORD_BOUNDARY w aɪ WORD_BOUNDARY m æ t ə ɹ ɹ WORD_BOUNDARY ɪ m ɪ t s WORD_BOUNDARY ɹ eɪ d ɪ eɪ ʃ ə n WORD_BOUNDARY k w ɔ n t ə m WORD_BOUNDARY m ɪ k æ n ɪ k s WORD_BOUNDARY ʌ p l aɪ z WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY v ɛ ɹ i WORD_BOUNDARY s m ɔ l WORD_BOUNDARY θ ɪ ŋ z WORD_BOUNDARY l aɪ k WORD_BOUNDARY ð ɪ WORD_BOUNDARY ɪ l ɛ k t ɹ ɑ n z WORD_BOUNDARY p ɹ oʊ t ɑ n z WORD_BOUNDARY æ n d WORD_BOUNDARY n uː t ɹ ɑ n z WORD_BOUNDARY ð æ t WORD_BOUNDARY m eɪ k WORD_BOUNDARY ʌ p WORD_BOUNDARY ʌ n WORD_BOUNDARY æ t ə m WORD_BOUNDARY p iː p ə l WORD_BOUNDARY l aɪ k WORD_BOUNDARY w ɜː n ə ɹ WORD_BOUNDARY h aɪ z ə n b ɜː ɡ WORD_BOUNDARY ɜː w ɪ n WORD_BOUNDARY ʃ ɹ ɜː d ɪ ŋ ɡ ə ɹ WORD_BOUNDARY æ n d WORD_BOUNDARY p ɔ l WORD_BOUNDARY d ɜː ɹ æ k WORD_BOUNDARY k ə n t ɪ n j uː d WORD_BOUNDARY t ə WORD_BOUNDARY w ɜː k WORD_BOUNDARY ɔ n WORD_BOUNDARY k w ɔ n t ə m WORD_BOUNDARY m ɪ k æ n ɪ k s WORD_BOUNDARY æ n d WORD_BOUNDARY ɪ v ɛ n t̠ʃ uː ə l i WORD_BOUNDARY w iː WORD_BOUNDARY ɡ ɑ t WORD_BOUNDARY ð ə WORD_BOUNDARY s t æ n d ə ɹ d WORD_BOUNDARY m ɑ d ə l WORD_BOUNDARY