Question

use the student information sheet to find the answers to the following questions.

1. the vertical columns on the periodic table are called _
2. the horizontal rows on the periodic table are called _
3. most of the elements in the periodic table are classified as metals / nonmetals / metalloids
4. the elements that touch the stairstep line are classified as _
5. the elements in the right corner are classified as metals / nonmetals / metalloids
6. elements in the first group have _ valence electron and are extremely reactive. they are called _ _
7. elements in the second group have _ valence electrons and are also very reactive. they are called _ _ _
8. elements in groups 3 through 12 have many useful properties and are called _
9. elements in group 17 are known as \salt formers\. they are called _. they have _ valence electrons.
10. elements in group 18 are very unreactive. they are said to be \inert\. we call these the _ _. they have _ valence electrons.
11. the elements at the bottom of the table were pulled out to keep the table from becoming too long. the first period at the bottom is called the _
12. the second period at the bottom of the table is called the _

Explanation:

1. The vertical columns on the periodic table are called groups or families.
2. The horizontal rows on the periodic table are called periods.
3. Most of the elements in the periodic table are metals.
4. The elements that touch the stair - step line are metalloids.
5. The elements in the right corner are non - metals.
6. Elements in the first group have 1 valence electron and are called alkali metals.
7. Elements in the second group have 2 valence electrons and are called alkaline earth metals.
8. Elements in groups 3 through 12 are transition metals.
9. Elements in group 17 are halogens and have 7 valence electrons.
10. Elements in group 18 are noble gases and have 8 valence electrons (except helium which has 2).
11. The first period at the bottom is the lanthanide series.
12. The second period at the bottom is the actinide series.

Answer:

1. groups/families
2. periods
3. metals
4. metalloids
5. non - metals
6. 1; alkali metals
7. 2; alkaline earth metals
8. transition metals
9. halogens; 7
10. noble gases; 8 (or 2 for He)
11. lanthanide series
12. actinide series