교과서 질문
A hydrogen-filled balloon is ignited and 3 g of hydrogen is reacted with 24 g of oxygen. How many grams of water vapor form? (Assume that water vapor is the only product.)
Ch.2 - Atoms & Elements
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217
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Table of contents
- Ch.1 - Matter, Measurement & Problem Solving118
- Ch.2 - Atoms & Elements106
- Ch.3 - Molecules and Compounds131
- Ch.4 - Chemical Reactions and Chemical Quantities56
- Ch.5 - Introduction to Solutions and Aqueous Solutions82
- Ch.6 - Gases114
- Ch.7 - Thermochemistry96
- Ch.8 - The Quantum-Mechanical Model of the Atom60
- Ch.9 - Periodic Properties of the Elements90
- Ch.10 - Chemical Bonding I: The Lewis Model89
- Ch.11 - Chemical Bonding II: Molecular Shapes, VSEPR & MO Theory85
- Ch.12 - Liquids, Solids & Intermolecular Forces51
- Ch.13 - Solids & Modern Materials47
- Ch.14 - Solutions90
- Ch.15 - Chemical Kinetics115
- Ch.16 - Chemical Equilibrium68
- Ch.17 - Acids and Bases136
- Ch.18 - Aqueous Ionic Equilibrium153
- Ch.19 - Free Energy & Thermodynamics93
- Ch.20 - Electrochemistry106
- Ch.21 - Radioactivity & Nuclear Chemistry74
- Ch.22 - Organic Chemistry140
2장, 문제 6
Determine the number of protons and neutrons in uranium-235, which is used in nuclear fission, and write its symbol in the form AZX.
검증된 단계별 안내1
Identify the atomic number (Z) of uranium, which is 92. This number represents the number of protons in the nucleus.
Recognize that the mass number (A) of uranium-235 is 235. This number is the sum of protons and neutrons in the nucleus.
Calculate the number of neutrons by subtracting the atomic number (Z) from the mass number (A): Neutrons = A - Z.
Write the symbol for uranium-235 in the form A^ZX, where A is the mass number, Z is the atomic number, and X is the chemical symbol for uranium (U).
Combine the information to express uranium-235 as 235^92U, indicating its composition of protons and neutrons.
주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Atomic Structure
Atoms consist of protons, neutrons, and electrons. Protons are positively charged particles found in the nucleus, while neutrons are neutral particles that also reside in the nucleus. The number of protons defines the element, while the total number of protons and neutrons gives the atomic mass.
추천 영상:
가이드 코스
02:10
Atom Structure
Isotopes
Isotopes are variants of a chemical element that have the same number of protons but different numbers of neutrons. For example, uranium-235 has 92 protons (as all uranium isotopes do) and 143 neutrons, distinguishing it from other isotopes like uranium-238, which has 146 neutrons.
추천 영상:
가이드 코스
04:36Isotopes
Nuclear Fission
Nuclear fission is a process in which the nucleus of an atom splits into smaller parts, releasing a significant amount of energy. Uranium-235 is a key fuel in nuclear reactors because it can sustain a chain reaction when it absorbs a neutron, leading to the release of energy and more neutrons.
추천 영상:
가이드 코스
03:29Band of Stability: Nuclear Fission