Question

name
class
date
5.4 the periodic table: organizing the elements
section review
objectives

• describe the origin of the periodic table
• identify the position of groups, periods, and the transition metals in the

periodic table
key terms

• periodic table
• periods
• periodic law
• group
• representative elements
• metals
• alkali metals
• alkaline earth metals
• transition metals
• inner transition metals
• nonmetals
• halogens
• noble gases
• metalloids

part a completion
use this completion exercise to check your understanding of the concepts and terms
that are introduced in this section. each blank can be completed with a term, short
phrase, or number.
the periodic table organizes the elements into vertical 1 and horizontal 2 in order of increasing 3. the table is
constructed so that elements that have similar chemical properties are in the same 4. the elements in groups 1a through 7a are called the 5. the 6 make up group 0. the elements in
groups 2a and 3a are interrupted in periods 4 and 5 by the 7 and in the periods 6 and 7 by the 8. the group 1a elements
are called the 9, and the group 2a elements are called the

1. the nonmetals of 11 are called the halogens.

elements with properties that are intermediate between those of
metals and nonmetals are called 12.

Explanation:

• The periodic table has vertical groups (columns) and horizontal periods (rows). Elements are ordered by increasing atomic number. Similar - property elements are in the same group. Groups 1A - 7A are representative elements. Group 0 has noble gases. Transition metals interrupt Groups 2A and 3A in periods 4 and 5, and inner - transition metals in periods 6 and 7. Group 1A is alkali metals, Group 2A is alkaline earth metals. Group 7A non - metals are halogens. Metalloids have intermediate properties.

Answer:

1. groups
2. periods
3. atomic number
4. group
5. representative elements
6. noble gases
7. transition metals
8. inner transition metals
9. alkali metals
10. alkaline earth metals
11. Group 7A
12. metalloids