Question

periodic table 5.4

1. what is the name of the horizontal groupings called?
2. what are the two names the columns can be called? & or
3. what type of elements will you find on the right side of the periodic table?
4. what type of element will you find on the left side of the periodic table?
5. how many horizontal rows will you find on the periodic table?
6. how many columns will you find on the periodic table?
7. why are the inner transition metals found on the bottom of the periodic table?
8. what is the name of the two groups? 8a) top 8b) bottom series series
9. what is the name that is given to the group 1a?
10. what is the name that is given to the group 2a?
11. what is the name of the large group of metals found in the middle of the table?
12. what is the collective name for the a series 1 - 2 a & 3 - 8a series of elements?

define the following terms related to metal properties: (pg 125)

1. ductile:
2. malleable:
3. luster:
4. electrical conductivity:
5. estimate a percent of elements that are metals? %
6. describe the characteristics of non - metals: generally & poor
7. why are nobel gases called nobel?
8. what are metalloids?

Explanation:

1. The horizontal groupings in the periodic table are called periods.
2. The columns can be called groups or families.
3. Non - metals are found on the right side of the periodic table.
4. Metals are found on the left side of the periodic table.
5. There are 7 horizontal rows (periods) in the periodic table.
6. There are 18 columns (groups) in the periodic table.
7. Inner transition metals are placed at the bottom to keep the table compact and organized.

8a. The top series of inner - transition metals is the lanthanide series.
8b. The bottom series of inner - transition metals is the actinide series.

1. Group 1A is called the alkali metals.
2. Group 2A is called the alkaline earth metals.
3. The large group of metals in the middle of the table are the transition metals.
4. The A series 1 - 2A and 3 - 8A are called the main - group elements.
5. Ductile means a material can be drawn into a wire.
6. Malleable means a material can be hammered or rolled into thin sheets.
7. Luster refers to the ability of a material to reflect light, giving it a shiny appearance.
8. Electrical conductivity is the ability of a material to allow the flow of an electric current.
9. Approximately 75% of the elements are metals.
10. Non - metals are generally brittle and poor conductors of heat and electricity.
11. Nobel gases are called "noble" because they are chemically inert and rarely react with other elements.
12. Metalloids have properties intermediate between metals and non - metals.

Answer:

1. Periods
2. Groups, Families
3. Non - metals
4. Metals
5. 7
6. 18
7. To keep the table compact and organized

8a. Lanthanide series
8b. Actinide series

1. Alkali metals
2. Alkaline earth metals
3. Transition metals
4. Main - group elements
5. A material can be drawn into a wire
6. A material can be hammered or rolled into thin sheets
7. The ability of a material to reflect light, giving it a shiny appearance
8. The ability of a material to allow the flow of an electric current
9. 75
10. Brittle, conductors of heat and electricity
11. Because they are chemically inert and rarely react with other elements
12. Elements with properties intermediate between metals and non - metals