Question

a. organization of the periodic table

1. why do elements in the same group have similar physical and chemical properties?

1. what are the three major categories of the elements?

metals | non - metals | metallurgist

b. properties of metals and important metal groups

1. list 5 properties that most metals have in common.

1. what does malleable mean? what does ductile mean?

malleable: | ductile:

1. where are alkali metals found in the periodic table? list all of them.

1. why are alkali metals so reactive? how does reactivity change as you go down the group?

1. list all the metals in the alkaline earth metals group.

1. where are alkaline earth metals commonly found on earth? list three places.

Explanation:

1. Elements in the same group have similar physical and chemical properties because they have the same number of valence electrons.
2. The three major categories of elements are Metals, Non - Metals, and Metalloids.
3. Five common properties of most metals are: good conductors of heat, good conductors of electricity, malleable, ductile, and have a shiny luster.
4. Malleable means able to be hammered or rolled into thin sheets. Ductile means able to be drawn out into a thin wire.
5. Alkali metals are found in Group 1 of the periodic table. They are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
6. Alkali metals are very reactive because they have one valence electron which is easily lost. As you go down the group, reactivity increases due to the increasing atomic size and decreasing ionization energy.
7. The metals in the alkaline earth metals group are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
8. Alkaline earth metals are commonly found in rocks, minerals, and sea - water.

Answer:

1. They have the same number of valence electrons.
2. Metals, Non - Metals, Metalloids
3. Good conductors of heat, good conductors of electricity, malleable, ductile, shiny luster
4. Malleable: Able to be hammered or rolled into thin sheets. Ductile: Able to be drawn out into a thin wire.
5. Group 1; lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), francium (Fr)
6. They have one valence electron which is easily lost. Reactivity increases as you go down the group.
7. beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), radium (Ra)
8. Rocks, minerals, sea - water