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Comprehensive Study Guide for Chem 1040: Key Topics, Practice Questions, and Exam Preparation $3.39   Add to cart

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Comprehensive Study Guide for Chem 1040: Key Topics, Practice Questions, and Exam Preparation

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This document is a comprehensive study guide for Chem 1040, designed to help students prepare for exams and master key concepts in general chemistry. It covers a wide range of foundational topics, including atomic structure, chemical bonding, stoichiometry, thermochemistry, gas laws, solutions, aci...

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  • November 11, 2024
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  • 2024/2025
  • Exam (elaborations)
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1. Atomic Structure and Periodic Trends

Q1: What is the electron configuration for a neutral atom of sulfur (S)?

● A1: The electron configuration is 1s22s22p63s23p41s^2 2s^2 2p^6 3s^2
3p^41s22s22p63s23p4.

Q2: What trend is observed in atomic radius across a period in the periodic table?

● A2: The atomic radius decreases from left to right across a period due to increasing
nuclear charge, which pulls the electrons closer to the nucleus.

2. Chemical Bonding

Q3: What type of bond forms between sodium (Na) and chlorine (Cl) in sodium chloride (NaCl)?

● A3: An ionic bond forms between sodium and chlorine due to the transfer of an electron
from sodium to chlorine.

Q4: Explain why water (H₂O) has a bent molecular shape.

● A4: Water has a bent shape due to the two lone pairs on the oxygen atom, which repel
the bonded pairs, causing the H-O-H bond angle to be approximately 104.5°.

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