Question

match the people to their contribution
match term definition

1. james chadwick a. created a periodic table by atomic number allowing periodic trends to align.
2. democritus b. measured the mass and charge of an electron
3. moseley c. created a periodic table that predicted unknown elements by mass
4. robert millikan d. gold foil experiment proving positive nucleus
5. ernest rutherford e. proved the existence of electrons
6. dalton f. discover neutrons in the nucleus
7. j.j. thomson g. determined whole number mass ratios in compounds
8. mendeleev h. called the smallest indivisible matter atomos
9. sir william crookes i. no empty space; 4 elements wind, fire, water, earth
10. aristotle j. worked with cathode tubes and cathode rays

Explanation:

1. James Chadwick discovered neutrons in the nucleus.
2. Democritus called the smallest indivisible matter atomos.
3. Moseley created a periodic table by atomic number allowing periodic trends to align.
4. Robert Millikan measured the mass and charge of an electron.
5. Ernest Rutherford did the gold - foil experiment proving positive nucleus.
6. Dalton determined whole number mass ratios in compounds.
7. J.J. Thomson proved the existence of electrons.
8. Mendeleev created a periodic table that predicted unknown elements by mass.
9. Sir William Crookes worked with cathode tubes and cathode rays.
10. Aristotle believed in no empty space; 4 elements wind, fire, water, earth.

Answer:

1. F
2. H
3. A
4. B
5. D
6. G
7. E
8. C
9. J
10. I