Exploring Dalton's Atomic Theory and Its Fundamental Laws

Dalton's Atomic Theory was developed to explain the laws of conservation of mass, definite proportions, and multiple proportions. The Law of Conservation of Mass states that matter is neither created nor destroyed in a chemical reaction. The Law of Definite Proportions asserts that a compound always contains the same proportion of elements by mass. The Law of Multiple Proportions describes how the masses of one element that combine with a fixed mass of another element form simple whole number ratios. Dalton's Atomic Theory attempts to explain these observations.

What is the primary goal of Dalton's Atomic Theory?

• To summarize observations

• To destroy matter

• To explain the why behind observations

• To create new elements

Tags

NGSS.HS-PS1-7

According to the Law of Conservation of Mass, what happens to matter in a chemical reaction?

• It changes into energy

• It is neither created nor destroyed

• It is destroyed

• It is created

Tags

NGSS.HS-PS1-7

In the reaction between sodium metal and chlorine gas, if 7.7 g of sodium reacts with 11.9 g of chlorine, how much sodium chloride is produced?

• 7.7 g

• 19.6 g

• 15.6 g

• 11.9 g

Tags

NGSS.HS-PS1-7

What does the Law of Definite Proportions state about samples of a given compound?

• They have the same proportions of their constituent elements

• They have different proportions of their constituent elements

• They have no proportions of their constituent elements

• They change proportions based on the source

What is the ratio of oxygen to hydrogen by mass in pure water?

• 1 to 8

• 8 to 1

• 1 to 2

• 2 to 1

According to the Law of Multiple Proportions, how can the masses of element B that combine with 1 g of element A be expressed?

• As a ratio of large whole numbers

• As a ratio of small whole numbers

• As a ratio of fractions

• As a ratio of decimals

If a sample of carbon dioxide has 1 g of carbon, how much oxygen does it have?

• 1.33 g

• 2.67 g

• 3.67 g

• 0.67 g

Tags

NGSS.HS-PS1-7

If a sample of carbon monoxide has 1 g of carbon, how much oxygen does it have?

• 1.33 g

• 0.67 g

• 2.67 g

• 3.67 g

Tags

NGSS.HS-PS1-7

What is the ratio of the mass of oxygen in carbon dioxide to the mass of oxygen in carbon monoxide?

• 1

• 2

• 4

• 3

What does Dalton's Atomic Theory attempt to explain?

• The observations summarized by the three laws

• The creation of new elements

• The destruction of matter

• The conversion of mass to energy

Tags

NGSS.HS-PS1-7