Honors Chemistry Summer Assignment 2026

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II. Chapter 2: Matter and Its Properties

1. Classification of Matter

• Pure Substances: Includes Elements (e.g., Chlorine, Copper) and Compounds (e.g., \(H_2O\), Salt).
• Mixtures:
  • Homogeneous: Uniform throughout (e.g., Air, Salt Water).
  • Heterogeneous: Non-uniform (e.g., Dirt, Pizza).

2. Changes in Matter

• Physical Change: Does not change the identity of the substance. (e.g., Boiling, Evaporating, Dissolving, Mixing, Freezing).
• Chemical Change: Results in a new substance. (e.g., Rusting, Baking, Reacting).

3. Properties of Matter

• Intensive: Independent of the amount of matter (e.g., Color, Taste, Density, Solubility, Conductivity).
• Extensive: Dependent on the amount of matter (e.g., Mass, Volume, Size).

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III. Chapter 3: Measurement & Math Skills

1. Metric System

• Required Prefixes: Nano (\(n\)), Micro (\(\mu\)), Milli (\(m\)), Deci (\(d\)), Centi (\(c\)), and Kilo (\(k\)).

2. Significant Figures (Sig Figs)

• Identification:
  • Zeros at the end of a number with no decimal are not significant (e.g., \(400\) cm has 1 sig fig).
  • Zeros at the end of a number with a decimal are significant (e.g., \(400.0\) cm has 4 sig figs).
• Calculations:
  • Multiplication/Division: Round to the fewest number of significant digits.
  • Addition/Subtraction: Round to the least number of decimal places (or the same precision as the least precise measurement).

3. Dimensional Analysis & Density

• Format: You must show work using unit cancellation for credit.
• Density Formula: \(Density = \frac{mass}{volume}\) (Common units: \(g/cm^3\)).
• Work Habit: Always include units and report final answers with the correct number of significant digits.

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IV. Chapter 4: Atomic Structure

1. Scientists and Models

• Thomson: Known for the "plum pudding" model and cathode ray tube experiment.
• Rutherford: Known for the Gold Foil experiment; discovered the nucleus.

2. Subatomic Particles

• Atomic Number: Number of protons (identifies the element).
• Mass Number: Protons + Neutrons.
• Isotopes: Atoms of the same element that have the same number of protons but a different number of neutrons.

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V. Chapter 5: Electromagnetic Radiation

1. The Spectrum

• Longest Wavelength: Radio waves.
• Highest Frequency/Energy: Gamma rays.
• Speed: All forms of electromagnetic radiation travel at the speed of light (\(c\)).

2. Equations & Calculations

• Speed of Light: \(c = \lambda\nu\) (where \(\lambda\) is wavelength and \(\nu\) is frequency).
• Energy: \(E = h\nu\) (where \(h\) is Planck’s constant).
• Requirement: For the quiz, you must write the equation, show values substituted for variables, and include units in your final answer.

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The issue contains assignment material for Chapters 2–5 but names no target file, entry point, or existing content location. First confirm where the 2026 assignment belongs and what format is expected; done should mean the approved material is added there with the requested scope and formatting.