Early Ideas About Matter

What is Dalton's atomic theory?

• Dalton's atomic theory states that all matter is composed of indivisible particles called atoms.

• Dalton's atomic theory states that atoms of different elements have different properties and combine in whole number ratios to form compounds.

• Dalton's atomic theory states that atoms can be divided into smaller particles called subatomic particles.

• Dalton's atomic theory states that atoms are made up of protons, neutrons, and electrons.

Tags

NGSS.HS-PS1-7

What are the main postulates of Dalton's atomic theory?

• 1. All matter is composed of divisible particles called atoms. 2. Atoms of the same element have different properties, while atoms of different elements are identical in size, mass, and other properties. 3. Atoms can be created, destroyed, or divided into smaller particles in chemical reactions. 4. Chemical reactions involve the combination of atoms to form new substances.

• The main postulates of Dalton's atomic theory are: 1. All matter is composed of indivisible particles called atoms. 2. Atoms of the same element are identical in size, mass, and other properties, while atoms of different elements have different properties. 3. Atoms cannot be created, destroyed, or divided into smaller particles in chemical reactions. 4. Chemical reactions involve the rearrangement of atoms to form new substances.

• 1. All matter is composed of molecules, not atoms. 2. Atoms of the same element have different properties, while atoms of different elements are identical in size, mass, and other properties. 3. Atoms can be created, destroyed, or divided into smaller particles in chemical reactions. 4. Chemical reactions involve the rearrangement of molecules to form new substances.

• 1. All matter is composed of indivisible particles called molecules. 2. Atoms of the same element have different properties, while atoms of different elements are identical in size, mass, and other properties. 3. Atoms can be created, destroyed, or divided into smaller particles in chemical reactions. 4. Chemical reactions involve the rearrangement of atoms and molecules to form new substances.

Tags

NGSS.HS-PS1-7

Where can protons and neutrons be found in the atom?

• On orbitals

• Inside the nucleus

• On the outside of nucleus

• In the space surrounding the nucleus

What is the relative electric charge of an electron?

• -1

• +1

• 0

• None of the above

What is an atom?

• A subatomic particle consisting of neutrons, protons, and electrons.

• A type of molecule that make a new molecules.

• The smallest particle of an element that exhibits all of the characteristic properties of that element

• A form of energy that can change a shape and size.

Tags

NGSS.MS-PS1-1

What are the three subatomic particles of an atom?

• protons, neutrons, and electrons

• protons, electrons, and quarks

• protons, neutrons, and positrons

• electrons, photons, and neutrinos

What is the relative electric charge of a proton?

• -1

• +1

• 0

• none of the above

What is the relative electric charge of a neutron?

• +1

• -1

• 0

• none of the above

Where can electrons be found?

• In the middle

• Inside the nucleus

• In the space surrounding the nucleus

• Next to the nucleus

How dalton's theory of the atom and the conservation of mass are related?

• Dalton explained that atoms are created but not destroyed in chemical reactions.

• Dalton explained that atoms are neither created nor destroyed in chemical reactions but only rearranged.

• Dalton explained that atoms are either created or destroyed in chemical reactions also rearranged.

• Dalton explained that atoms are both created and destroyed in chemical reactions and sometimes rearranged.

Tags

NGSS.HS-PS1-7