The radius of an atom of copper (Cu) is about 140 pm. (c) If you assume that the Cu atom is a sphere, what is the volume in cm3 of a single atom?
Ch.2 - Atoms, Molecules, and Ions
Chapter 2, Problem 22b
Determine whether each of the following statements is true or false. If false, correct the statement to make it true: (b) Every atom of a given element has the same number of protons.
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Identify the definition of an element: An element is defined by the number of protons in its atoms, which is known as the atomic number.
Understand that the atomic number is unique to each element and does not change. Therefore, every atom of a given element must have the same number of protons.
Recognize that while the number of protons remains constant for a given element, the number of neutrons can vary, leading to different isotopes of the same element.
Evaluate the statement: 'Every atom of a given element has the same number of protons.' This statement is true because the defining characteristic of an element is its number of protons.
Conclude that the statement is true and does not require correction.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Atomic Structure
Atoms are the basic units of matter, consisting of protons, neutrons, and electrons. The number of protons in an atom's nucleus defines the element and is known as the atomic number. For example, all carbon atoms have six protons, which distinguishes them from other elements.
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Atom Structure
Element Definition
An element is a pure substance that cannot be broken down into simpler substances by chemical means. Each element is characterized by its unique number of protons, which determines its chemical properties and position in the periodic table. Thus, all atoms of a given element share the same number of protons.
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Law of Definite Proportions
True/False Statements in Science
In scientific reasoning, statements can be evaluated as true or false based on empirical evidence and established theories. A true statement accurately reflects scientific understanding, while a false statement may require correction. In this case, the statement about protons is true, as all atoms of a specific element indeed have the same number of protons.
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Third Law of Thermodynamics Example
Related Practice
Textbook Question
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Open Question
Answer the following questions without referring to Table 2.1: (a) What are the main subatomic particles that make up the atom? (b) What is the relative charge (in multiples of the electronic charge) of each proton? (b) What is the relative charge (in multiples of the electronic charge) of each neutron? (b) What is the relative charge (in multiples of the electronic charge) of each electron? (c) Which of the particles is the most massive? (d) Which is the least massive?
Textbook Question
Determine whether each of the following statements is true or false. If false, correct the statement to make it true: (a) The nucleus has most of the mass and comprises most of the volume of an atom.
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Textbook Question
Determine whether each of the following statements is true or false. If false, correct the statement to make it true: (c) The number of electrons in an atom equals the number of neutrons in the atom.
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Textbook Question
Determine whether each of the following statements is true or false. If false, correct the statement to make it true: (d) The protons in the nucleus of the helium atom are held together by a force called the strong nuclear force.
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Textbook Question
Consider an atom of 10B. (a) How many protons, neutrons, and electrons does this atom contain?
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