Exploring Atomic Theories and Laws in Chemistry

Who proposed the law of conservation of mass?

• Ernest Rutherford

• Dmitri Mendeleev

• Antoine Lavoisier

• John Dalton

Tags

NGSS.MS-PS1-5

In a chemical reaction, the mass of the products is equal to the mass of the reactants. This statement is an example of which law?

• Law of Definite Proportions

• Dalton's Atomic Theory

• Law of Multiple Proportions

• Law of Conservation of Mass

Tags

NGSS.MS-PS1-5

If 12 grams of oxygen react with 1.5 grams of hydrogen, what is the mass of the water vapor produced?

• 14.5 grams

• 13.5 grams

• 15.5 grams

• 10.5 grams

Tags

NGSS.MS-PS1-5

What does the law of definite proportions state?

• All samples of a given compound have the same proportions of their constituent elements.

• Matter is neither created nor destroyed.

• The masses of one element that combine with a fixed mass of another element are in a ratio of small whole numbers.

• Atoms combine in simple whole number ratios to form compounds.

In the law of definite proportions, what is the ratio of carbon to oxygen in carbon monoxide?

• 1:2.66

• 1:2

• 1:1.33

• 1:1

Tags

NGSS.MS-PS1-1

Which law explains that the masses of one element that combine with a fixed mass of another element are in a ratio of small whole numbers?

• Law of Definite Proportions

• Law of Conservation of Mass

• Law of Multiple Proportions

• Dalton's Atomic Theory

Tags

NGSS.HS-PS1-7

What is the ratio of hydrogen to oxygen in water (H2O) according to the law of multiple proportions?

• 2:2

• 2:1

• 1:1.33

• 1:1

Tags

NGSS.MS-PS1-1

According to Dalton's atomic theory, what are atoms of a given element characterized by?

• Ability to change into atoms of another element

• Indivisibility and destructibility

• Same mass and other properties

• Different masses and properties

What is the core of the atom called according to the nuclear theory?

• Proton

• Electron cloud

• Nucleus

• Neutron

What is the charge of an atom according to the nuclear theory?

• Negatively charged

• Depends on the number of protons

• Positively charged

• Neutral