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Ch.2 - Atoms, Molecules, and Ions
Brown - Chemistry: The Central Science 14th Edition
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Brown 14th EditionCh.2 - Atoms, Molecules, and Ions문제 88b
2장, 문제 88b

The natural abundance of 3He is 0.000137%. (b) Based on the sum of the masses of their subatomic particles, which is expected to be more massive, an atom of 3He or an atom of 3H (which is also called tritium)?

검증된 단계별 안내
1
Identify the subatomic particles in each isotope: 3He has 2 protons, 1 neutron, and 2 electrons, while 3H has 1 proton, 2 neutrons, and 1 electron.
Calculate the mass of the protons in each isotope: Each proton has a mass of approximately 1.0073 amu.
Calculate the mass of the neutrons in each isotope: Each neutron has a mass of approximately 1.0087 amu.
Calculate the mass of the electrons in each isotope: Each electron has a mass of approximately 0.00055 amu.
Sum the masses of the subatomic particles for each isotope to determine which is more massive.

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
4m

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Subatomic Particles

Atoms are composed of subatomic particles: protons, neutrons, and electrons. Protons and neutrons reside in the nucleus and contribute to the atomic mass, while electrons are much lighter and orbit the nucleus. The number of protons defines the element, while the number of neutrons can vary, leading to different isotopes.
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가이드 코스
05:19
Subatomic Particles

Isotopes

Isotopes are variants of a chemical element that have the same number of protons but different numbers of neutrons. For example, both helium-3 (³He) and tritium (³H) are isotopes of hydrogen, with ³He having two protons and one neutron, while ³H has one proton and two neutrons. This difference in neutron count affects their mass and stability.
추천 영상:
가이드 코스
04:36
Isotopes

Atomic Mass Calculation

The atomic mass of an isotope is calculated based on the sum of the masses of its subatomic particles. For ³He, the mass is derived from 2 protons and 1 neutron, while for ³H, it comes from 1 proton and 2 neutrons. Understanding how to calculate and compare these masses is essential for determining which isotope is more massive.
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가이드 코스
02:00
Calculating Atomic Mass
관련 실천
교과서 질문

A cube of gold that is 1.00 cm on a side has a mass of 19.3 g. A single gold atom has a mass of 197.0 u. (a) How many gold atoms are in the cube?

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교과서 질문

Suppose a scientist repeats the Millikan oil-drop experiment but reports the charges on the drops using an unusual (and imaginary) unit called the warmomb (wa). The scientist obtains the following data for four of the drops: Droplet Calculated Charge (wa) A 3.84⨉10−8 B 4.80⨉10−8 C 2.88⨉10−8 D 8.64⨉10−8 (d) What is the conversion factor between warmombs and coulombs?

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교과서 질문

The natural abundance of 3He is 0.000137%. (a) How many protons, neutrons, and electrons are in an atom of 3He?

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교과서 질문

Suppose a scientist repeats the Millikan oil-drop experiment but reports the charges on the drops using an unusual (and imaginary) unit called the warmomb (wa). The scientist obtains the following data for four of the drops: Droplet Calculated Charge (wa) A 3.84⨉10−8 B 4.80⨉10−8 C 2.88⨉10−8 D 8.64⨉10−8 (c) Based on your answer to part (b), how many electrons are there on each of the droplets?

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교과서 질문

The natural abundance of 3He is 0.000137%. (c) Based on your answer to part (b), what would need to be the precision of a mass spectrometer that is able to differentiate between peaks that are due to 3He+ and 3H+?

565
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