dalton, thomson, and rutherford's ideas

DALTON’S MODEL

an indiv sphere

DALTON’S IDEAS

• all matter is composed of atoms

• all atoms in a certain element are identical

• atoms are indivisible

• atoms combine in simple whole number ratios to make compounds

THOMSON’S MODEL

plum pudding model

THOMSON’S IDEAS

• electrons are found in the atom; which proved Dalton wrong

• electrons are spread out throughout positive matter

RUTHERFORD’S MODEL

nuclear model

RUTHERFORD’S IDEAS

• atom is mostly empty space

• a tiny, dense, positively charged nucleus is at the center of the atom

• negatively charged electrons move around the empty space outside the nucleus

• discovered the proton