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Chapter 4: Problem 3

The smallest part of an element that retains the properties of the element is the ..3..

Short Answer

Expert verified
The atom is the smallest part of an element that retains its properties.

Step by step solution

01

Understanding the Basic Structure of Matter

All matter is made up of elements, and elements are substances that cannot be broken down into simpler substances by chemical means. Each element is made up of one type of atom.
02

Identifying the Fundamental Unit of an Element

The fundamental unit of an element that retains its chemical properties is the atom. Atoms are the smallest units that define the chemical elements and their isotopes.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Elements
Elements are the fundamental substances that make up all matter in the universe. Each element is defined by the number of protons it contains, which is known as the atomic number.
For example, hydrogen is an element with one proton, while carbon has six protons.
  • Elements cannot be broken down into simpler substances by chemical reactions.
  • Each element is composed of atoms, which are the simplest units.
This uniqueness in the atomic structure of elements gives each its own distinct set of physical and chemical properties, such as density, boiling point, and color. The periodic table is an organized way of displaying all known elements based on their atomic number and other properties.
Chemical Properties
Chemical properties are aspects of a substance that become evident during a chemical reaction. These properties determine how a substance reacts with other substances. This includes reactivity with water, acid, base, and other chemicals.
For instance, iron reacts with oxygen to form rust, a new substance.
  • A chemical property might involve a substance changing into a different substance, showing a transformation.
  • Examples include flammability, acidity, and combustibility.
These properties are crucial for identifying substances and predicting how a substance will react under certain conditions. Understanding chemical properties helps scientists and engineers to use substances safely and effectively.
Isotopes
Isotopes are variants of a particular chemical element that differ in neutron number, while their proton number remains the same. This means isotopes have the same atomic number but different mass numbers.
Carbon-12 and Carbon-14 are popular examples, with both having six protons but different neutron numbers.
  • Isotopes of an element have similar chemical properties because they have the same number of electrons.
  • They may, however, have different physical properties, such as half-life or stability.
Isotopes play an important role in various scientific techniques, like radiocarbon dating and medical imaging. Understanding isotopes provides insight into the age of archaeological finds or the processes happening inside stars for instance.

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Most popular questions from this chapter

In a chemical formula, each element is represented by its (a) atomic number (c) atomic mass (b) chemical symbol (d) electric charge

A pair of shared electrons forms a (an) (a) covalent bond (e) unstable bond (b) ionic bond (d) radioactive bond

The force that holds atoms together is known as a (an) (a) atomic bond (c) isotopic bond (b) chemical bond (d) covalent bond

The pull of gravity on the mass of a substance is known as ..2..

Of the following, a true statement about an atom is (a) an atom has excess electric charges (b) an atom has an unstable nucleus (c) the energy shells are visible inside the nucleus (d) an atom is electrically neutral
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