Dalton's Atomic Theory

What was the basis for Dalton's atomic theory?

• The law of conservation of mass and the law of constant composition

• The discovery of subatomic particles and isotopes

• The law of definite proportions

• The rearrangement of atoms in a chemical reaction

Tags

NGSS.HS-PS1-7

According to Dalton's atomic theory, all matter is made of ________.

• Molecules

• Protons, neutrons, and electrons

• Atoms

• Subatomic particles

Dalton proposed that all atoms of a given element are ________ in mass and properties.

• Different

• Similar

• Identical

• Varied

What did Dalton propose about compounds?

• Compounds are combinations of two or more different types of atoms

• Compounds are made up of molecules

• Compounds are always in a gaseous state

• Compounds have the same properties as their constituent elements

According to Dalton's atomic theory, a chemical reaction is ________.

• The creation of new atoms

• The destruction of atoms

• The rearrangement of atoms

• The conversion of atoms into energy

Tags

NGSS.HS-PS1-7

What have we learned since Dalton proposed his theory?

• Atoms are indivisible and solid spheres

• Atoms are mostly made up of empty space

• Atoms have no internal structure

• Atoms are identical in mass and properties

Which part of Dalton's atomic theory had to be modified based on the discovery of subatomic particles and isotopes?

• All matter is made of atoms

• All atoms of a given element are identical in mass and properties

• Compounds are combinations of two or more different types of atoms

• A chemical reaction is a rearrangement of atoms

What is the law of conservation of mass?

• Matter is not created or destroyed in a closed system

• A pure compound will always have the same proportion of the same elements

• Atoms are indivisible and solid spheres

• A chemical reaction is a rearrangement of atoms

Tags

NGSS.HS-PS1-7

What is the law of constant composition?

• Matter is not created or destroyed in a closed system

• A pure compound will always have the same proportion of the same elements

• Atoms are indivisible and solid spheres

• A chemical reaction is a rearrangement of atoms

What is the correct proportion of sodium and chlorine in table salt?

• 1:2

• 2:1

• 1:1

• 2:2

Tags

NGSS.HS-PS1-2