Chapter 3 Atomic Structure

What evidence did Democritus have to support his model of the cell theory?

Democritus

• 460-370 BC

• 460-370 AD

• 450-370 BC

• 460-360 BC

What did John Dalton discover?

• Atoms are the smallest part of any element. Atoms of the same element have different mass.

• Atoms are the smallest part of any element. Atoms of the same element have the same mass.

• Atoms are the largest part of any element. Atoms of the same element have the same mass.

• Atoms are the largest part of any element. Atoms of the same element have a different mass.

What does the Law of Definite Proportions state:

COPY EXACTLY WHAT I TOLD YOU TO WRITE DOWN. IT WILL BE MARKED WRONG IF YOU DON'TPUT THE EXACT ANSWER.

• When elements are combined in a compound, their ratio will always be a definite, whole- number
• When elements are combined in a compound, their ratio will always be a definite, decimal number

• When ions are combined in a compound, their ratio will always be a definite, whole- number

• When elements are combined in a mixture, their ratio will always be a definite, whole- number

When did John Dalton discover his Model of the Atomic theory/structure?

• 1808 AD

• 1807 AD

• 1809 AD

• 1806 AD

John Dalton said which of the following about an atoms in 1803:​

• Each element is composed of tiny particles called atoms

• All atoms of an element are identical

• Atoms can neither be created nor destroyed

• A given compound has the same ratio of atoms

• b. All atoms of an element are NOT identical

In 1897 WHO said the atom looked like a chocolate chip cookie?

• Democritus

• John Dalton

• J.J. Thomson

• Ernest Rutherford

J. J. Thompson discovered which of the following:

• protons

• neutrons

• electrons

Ernest Rutherford modeled which of the following:

• The atom has a small dense nucleus with electrons orbiting outside it at a distance.

• Most of an atom is empty space.

• Most of an atom’s mass is in its nucleus

• The atom is a sphere of positive charge with negatively charged electrons stuck inside it like chocolate chips in a cookie

What evidence did Ernest Rutherford have for his model findings in 1911?