Periodic Table
Groups:
On the Periodic Table there are 18 groups. Groups are the vertical columns that show how many valence electrons are in each element.Groups are also known as families.
Periods:
On the Periodic Table there are horizontal rows called periods. These rows show how many electron shells there are in each element.
Valence Electrons:
You can know the number of valence electrons by simply looking at the elements group. For example, if you wanted to find the number of valance electrons in magnesium, all you would have to do is simply look up finding the number 2. 2 is the number of valence electrons in magnesium.
Metals:
Metals are found in the center of the Periodic Table. They start at Lithium and go all the way to the bold, black, zig-zag line.
Nonmetals:
Nonmetals are found on the right side of the bold zig-zag line.
Metalloids:
Metalloids are found on either side of the zig-zag line on the Periodic Table.
Atomic Number:
The atomic number of an element shows how many protons are in the element. The elements are arranged by the atomic number going from least to greatest.
Atomic Mass:
The atomic mass of an element is found toward the bottom and when you subtract the atomic number from the atomic mass you get the number of neutrons that are in that element.
Elements are highly reactive if they are to the left of the periodic table because the more valence electrons you have, the less reactive they are. Metals are shiny, hard, and malleable. They are also good conductors of electricity. Nonmetals do not conduct heat or electricity very well. Metalloids share characteristics of both metals and nonmetals.
On the Periodic Table there are 18 groups. Groups are the vertical columns that show how many valence electrons are in each element.Groups are also known as families.
Periods:
On the Periodic Table there are horizontal rows called periods. These rows show how many electron shells there are in each element.
Valence Electrons:
You can know the number of valence electrons by simply looking at the elements group. For example, if you wanted to find the number of valance electrons in magnesium, all you would have to do is simply look up finding the number 2. 2 is the number of valence electrons in magnesium.
Metals:
Metals are found in the center of the Periodic Table. They start at Lithium and go all the way to the bold, black, zig-zag line.
Nonmetals:
Nonmetals are found on the right side of the bold zig-zag line.
Metalloids:
Metalloids are found on either side of the zig-zag line on the Periodic Table.
Atomic Number:
The atomic number of an element shows how many protons are in the element. The elements are arranged by the atomic number going from least to greatest.
Atomic Mass:
The atomic mass of an element is found toward the bottom and when you subtract the atomic number from the atomic mass you get the number of neutrons that are in that element.
Elements are highly reactive if they are to the left of the periodic table because the more valence electrons you have, the less reactive they are. Metals are shiny, hard, and malleable. They are also good conductors of electricity. Nonmetals do not conduct heat or electricity very well. Metalloids share characteristics of both metals and nonmetals.