Which of the following statements is true about the properties of protons, neutrons, and electrons?
Properties of subatomic particles
See Figure 4.7 and Table 4.1 on page 100.
Element Names, Symbols, and Atomic Numbers
To identify elements by their chemical symbol and their atomic number.
Chemical elements are substances that are composed of only one kind of atom and cannot be broken down into simpler substances. Elements are organized into a
table called the
periodic table of elements
, or simply the periodic table.
Each element is characterized by the number of protons in the nucleus. The number of protons in the nucleus is called the atomic number and is listed on the
periodic table. No two elements have the same atomic number; therefore, elements can be identified by their atomic numbers.
Elements are also identified by a unique chemical symbol that contains one or two letters to identify them. For example, the chemical symbol for oxygen is
the chemical symbol for copper is
What are the names of the elements symbolized by
, respectively? Spelling counts!
Enter the names of the elements, separated by commas.
How to approach the problem
Many chemical symbols are based on the English name of the element. For example, the chemical symbol for oxygen is
. Some elements, however,
have symbols based on their Latin or Greek names. For example, the symbol for mercury is
, from the Latin
. You should memorize the
chemical symbols for common elements.