Dalton's Atomic Theory

1. All matter is composed of __________.

• mass

• ratios

• chemicals

• atoms

Tags

NGSS.MS-PS1-1

Atoms of a given element are identical in size, _____, and other properties.

• shape

• mass

• source

• charge

Atoms cannot be subdivided, _________ or __________.

• divided or conquered

• created or destroyed

• bought or sold

• to be or not to be

Tags

NGSS.MS-PS1-5

Atoms of different elements combine in whole number ______ to form chemical compounds.

• atoms

• compounds

• chemicals

• ratios

In chemical reactions, atoms are __________, ____________, or ___________.

• combined, separated, rearranged

• combined, shifted, reorganized

• added, subtracted, combined

• subdivided, created or destroyed

Tags

NGSS.MS-PS1-5

What is the smallest unit of an element that retains the properties of that element?

• Molecule

• Atom

• Compound

• Ion

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DOK Level 1: Recall

Discuss how Dalton's Atomic Theory explains the conservation of mass in a chemical reaction.

• Atoms are created and destroyed in chemical reactions.

• Atoms are rearranged in chemical reactions, but their total number remains the same.

• Atoms change their identity in chemical reactions.

• Atoms are converted into energy in chemical reactions.

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DOK Level 3: Strategic Thinking

Which of the following is a key postulate of Dalton's Atomic Theory?

• Atoms can be divided into smaller particles.

• Atoms of the same element are identical in mass and properties.

• Atoms can change into other atoms in chemical reactions.

• Atoms are made up of protons, neutrons, and electrons.

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DOK Level 1: Recall

Which of the following statements is true about molecules?

• Molecules are made up of only one type of atom.

• Molecules are the smallest unit of a compound that retains its chemical properties.

• Molecules cannot be broken down into smaller parts.

• Molecules are always larger than atoms.

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DOK Level 1: Recall

Which of the following best describes atomic mass?

• The mass of an atom expressed in grams.

• The average mass of atoms of an element, calculated using the relative abundance of isotopes.

• The mass of an atom compared to a hydrogen atom.

• The total number of protons and neutrons in an atom.

Tags

DOK Level 2: Skill/Concept