Science and Technology Quiz Answers 2. Al is the symbol for Aluminum. 3. The Proton, discovered by Rutherford in 1919, is a positively charged particle found in the nuclei of atoms. 4. The common term for Dioxyribonucleic Acid is DNA. 5. The "Floppy Disk" was invented by IBM (International Business Machines). 6. Isaac Newton discovered the Law of Gravitation. 7. The Wright Brothers invented the first motorized airplane. 8. Sigmund Freud was the founder of psychoanalysis.
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