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Questions and Answers
What is the name of the process where a gas changes directly into a solid without passing through the liquid phase?
What is the name of the process where a gas changes directly into a solid without passing through the liquid phase?
- Sublimation
- Deposition (correct)
- Freezing
- Condensation
Which atomic model proposed that electrons orbit the nucleus in specific energy levels?
Which atomic model proposed that electrons orbit the nucleus in specific energy levels?
- Rutherford's Nuclear Model
- Dalton's Atomic Model
- Bohr's Atomic Model (correct)
- Thomson's Plum Pudding Model
An element has an atomic number of 12 and a mass number of 24. How many neutrons does this element have?
An element has an atomic number of 12 and a mass number of 24. How many neutrons does this element have?
- 12
- 36
- 24
- 10 (correct)
Which of the following is NOT a characteristic of metals?
Which of the following is NOT a characteristic of metals?
Which scientist is credited with the discovery of the electron?
Which scientist is credited with the discovery of the electron?
Flashcards
States of Matter
States of Matter
The three physical forms in which matter exists: solid, liquid, gas.
Phase Change Processes
Phase Change Processes
The 6 processes include melting, freezing, condensation, vaporization, sublimation, and deposition.
Atomic Model
Atomic Model
A theoretical representation of the structure of atoms, including various models like Dalton's, Thomson's, and Bohr's.
Mass Number Calculation
Mass Number Calculation
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Metals vs Non-Metals
Metals vs Non-Metals
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Study Notes
Matter
- Matter is anything that has mass and occupies space.
- Matter exists in three primary states: solid, liquid, and gas.
States of Matter
- Solid: Fixed shape and volume. Molecules are tightly packed.
- Liquid: Fixed volume, but takes the shape of its container. Molecules are less tightly packed than in a solid, but more so than a gas.
- Gas: Neither fixed shape nor volume; expands to fill its container. Molecules are widely dispersed.
Phase Change Processes
- Six processes govern transitions between these states: melting, freezing, vaporization, condensation, sublimation, and deposition.
Atomic Discovery
- Key figures in atomic theory and their contributions should be studied.
- Diverse models throughout history have been critical for understanding atoms.
Atomic Models
- Historical progression of models of the atom should be understood (e.g., Dalton's, Thomson's, Rutherford's, Bohr's, and modern quantum models.)
- Key atomic constituents include protons, neutrons, and electrons.
Calculating Atomic Properties
- Formulas to calculate mass numbers and quantities of subatomic particles (protons, neutrons, electrons) need to be mastered.
Classifying Elements
- Elements are categorized as metals, nonmetals, and metalloids based on their properties (e.g., conductivity, reactivity).
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