Atomic Theory

Question 1

What were the main points of Dalton’s atomic theory, and how did later discoveries modify them?

Answer 1

-Matter consists of tiny, indivisible particles called atoms
-Atoms of the same element are identical in mass and properties
-Atoms of different elements have different masses and properties
-Atoms combine in simple, whole-number ratios to form compounds
-Atoms cannot be created or destroyed in chemical reactions

-Discoveries like subatomic particles and Isotopes

Question 2

Explain the significance of the discovery of subatomic particles in the development of atomic theory

Answer 2

• Atoms are divisible
• Atoms of the same element can have different masses

Question 3

Describe the experiments that led to the discovery of the electron and the nucleus

Answer 3

-His gold foil experiment led to the discovery of the nucleus

Question 4

What is a Mole?

Answer 4

It is defined as the amount of a substance that contains the same number of particle

Question 5

What is Stoichiometry?

Answer 5

Stoichiometry refers to the mole ratio of reactants and products in a balanced equation

Question 6

What is a Titration?

Answer 6

Titration is a technique for determining the concentration of an unknown solution