Chap 4

Question 1

Thomas

Answer 1

Discovered electrons in 1897 and plum pudding model of atoms

Question 2

Rutherford

Answer 2

Discovered nucleus in 1911 and protons

Question 3

Dalton

Answer 3

1808

1. An element is composed of tiny indivisible atoms false
2. All atoms of an element are identical false
3. Atoms of different elements combined to for compounds
4. Compound contain atoms in small whole ratios
5. Atoms can combine to Form Different compounds

Question 4

Bohr

Answer 4

Electrons are in principle energy levels

Question 5

Mendeleev

Answer 5

Periodic table