Consider the atoms of 65Cu and 65Zn. Both of these atoms have the same

A) number of electrons. B) atomic mass. C) number of neutrons. D) mass number. E) number of protons. A) number of electrons. B) atomic mass. C) number of neutrons. D) mass number. E) number of protons.

Exam 1: A Very Brief History of Chemistry

Which of the following statements is/are NOT consistent with Dalton's atomic theory? I. The atoms in a given sample of an element do not share any common properties. II. Matter consists of tiny particles called molecular substances. III. In chemical reactions, atoms merely rearrange and do not disintegrate.

(Multiple Choice)

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Question 21

An ion of the isotope chlorine-35 has an ionic charge of 1-. How many protons, neutrons, and electrons does it contain? (p = proton, n = neutron, e = electron)Hint: Consider how changes in the number of electrons versus the number of protons affects the ionic charge of an ion.

(Multiple Choice)

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Question 22

Consider the atoms of ⁶⁵Cu and ⁶⁵Zn. Both of these atoms have the same

(Multiple Choice)

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Question 23

The atomic mass of naturally occurring nickel, which is a mixture of isotopes, is listed as 58.6934 u. This means that the average mass of nickel is

(Multiple Choice)

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Question 24

In a neutral atom, the number of protons must equal the number of neutrons.

(True/False)

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Question 25

In a mass spectrometer, a beam of ions emerge from between the poles of the magnet after being sorted into an array of beams based on their masses.

(True/False)

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Question 26

Which one of the following contributes to the charge of an atom, but does NOT contribute significantly to the mass of an atom?

(Multiple Choice)

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Question 27

What two factors determine the final chemical makeup of a planet?

(Short Answer)

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Question 28

When positive ions are formed in a mass spectrometer, they are attracted to a positively charged metal plate that has a small hole in its center.

(True/False)

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Question 29

Which of these scientists developed the atomic theory?

(Multiple Choice)

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Question 30

A naturally occurring element consists of three isotopes. The data for the isotopes are: Isotope 1: 146.9672 u, 64.792% Isotope 2: 148.9638 u, 26.117% Isotope 3: 149.9592 u, 9.0910% What is the average atomic mass of this naturally occurring element?

(Multiple Choice)

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Question 31

The hydrogen atom minus an electron is known as the proton.

(True/False)

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Question 32

A compound is made of nitrogen and hydrogen in a ratio of 22.6 grams nitrogen to 4.88 grams of hydrogen. There are ________ grams of hydrogen in a sample of the compound containing 12.6 grams of nitrogen. Hint: Consider the ratio of the masses to determine the mass of hydrogen.

(Short Answer)

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Question 33

Which description below fits the atom?Hint: Remember how charge alters the number of electrons.

(Multiple Choice)

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Question 34

What is the most logical reason for only light elements being formed during the nucleosynthesis stage of the big-bang? Hint: Consider the kinetic energy of the particles and how kinetic energy can affect them coming together.

(Multiple Choice)

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Question 35

Planets are formed after supernovas from ________ left over from the formation of a new star.

(Short Answer)

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Question 36

The atomic force microscope that is used with electrically nonconducting samples makes it possible to obtain an image of individual atoms.

(True/False)

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Question 37

Which answer below best describes all atoms of a particular element?

(Multiple Choice)

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Question 38

In a mass spectrometer, a beam of ions is sorted by the magnet into a number of beams based on the same charges that they have.

(True/False)

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Question 39

How many nucleons are in an atom of ⁴⁰K?

(Short Answer)

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Question 40

Showing 21 - 40 of 90

Exam 1: A Very Brief History of Chemistry

An ion of the isotope chlorine-35 has an ionic charge of 1-. How many protons, neutrons, and electrons does it contain? (p = proton, n = neutron, e = electron)Hint: Consider how changes in the number of electrons versus the number of protons affects the ionic charge of an ion.

Consider the atoms of 65Cu and 65Zn. Both of these atoms have the same

The atomic mass of naturally occurring nickel, which is a mixture of isotopes, is listed as 58.6934 u. This means that the average mass of nickel is

In a neutral atom, the number of protons must equal the number of neutrons.

In a mass spectrometer, a beam of ions emerge from between the poles of the magnet after being sorted into an array of beams based on their masses.

Which one of the following contributes to the charge of an atom, but does NOT contribute significantly to the mass of an atom?

What two factors determine the final chemical makeup of a planet?

When positive ions are formed in a mass spectrometer, they are attracted to a positively charged metal plate that has a small hole in its center.

Which of these scientists developed the atomic theory?

A naturally occurring element consists of three isotopes. The data for the isotopes are: Isotope 1: 146.9672 u, 64.792% Isotope 2: 148.9638 u, 26.117% Isotope 3: 149.9592 u, 9.0910% What is the average atomic mass of this naturally occurring element?

The hydrogen atom minus an electron is known as the proton.

A compound is made of nitrogen and hydrogen in a ratio of 22.6 grams nitrogen to 4.88 grams of hydrogen. There are ________ grams of hydrogen in a sample of the compound containing 12.6 grams of nitrogen. Hint: Consider the ratio of the masses to determine the mass of hydrogen.

Which description below fits the atom?Hint: Remember how charge alters the number of electrons.

What is the most logical reason for only light elements being formed during the nucleosynthesis stage of the big-bang? Hint: Consider the kinetic energy of the particles and how kinetic energy can affect them coming together.

Planets are formed after supernovas from ________ left over from the formation of a new star.

The atomic force microscope that is used with electrically nonconducting samples makes it possible to obtain an image of individual atoms.

Which answer below best describes all atoms of a particular element?

In a mass spectrometer, a beam of ions is sorted by the magnet into a number of beams based on the same charges that they have.

How many nucleons are in an atom of 40K?

Scientific Measurements

Elements, Compounds, and the Periodic Table

The Mole and Stoichiometry

Molecular View of Reactions in Aqueous Solutions

Oxidation-Reduction Reactions

Energy and Chemical Change

The Quantum Mechanical Atom

The Basics of Chemical Bonding

Theories of Bonding and Structure

Properties of Gases

Intermolecular Attractions and the Properties of Liquids and Solids

Mixtures at the Molecular Level: Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases, a Molecular Look

Acid-Base Equilibria in Aqueous Solutions

Solubility and Simultaneous Equilibria

Thermodynamics

Electrochemistry

Nuclear Reactions and Their Role in Chemistry

Metal Complexes

Organic Compounds, Polymers, and Biochemicals

Filters

Consider the atoms of ⁶⁵Cu and ⁶⁵Zn. Both of these atoms have the same

How many nucleons are in an atom of ⁴⁰K?