Periods are the horizontal rows on the Periodic Table. They also tell us the energy level of the elements.
Groups are the vertical rows on the Periodic Table. They tell us how many valence electrons are in each element.
We find the number of valence electrons in the group number. Those are the vertical rows described above.
Metals on the Periodic Table can be found on the left side of the zig-zag line. They contain the most reactive elements.
Nonmetals can be found on the right side of the zig-zag line. They contain the least reactive elements.
Metalloids are found along the zig-zag line spoken of above. Although not all of the elements touching the line are classified as metalloids. (Aluminum & ununseptium)
The atomic number tells us how many protons and electrons are in the element. They are arranged in order from highest to lower number.
The atomic mass can be found towards the bottom of the element. It contains the number of neutrons. But you have to subtract the # of protons from the atomic mass to get the correct number of neutrons.
The most reactive group of elements are in the first. As they move further right on the Periodic Table, they become less reactive. The Noble Gases are the least reactive elements. They have no reaction at all.
Metals can be filed into thin sheets known as foils. Metals happen to be good conductors because they have free electrons. They have the highest density and are the heaviest.
Nonmetals have very poor conductivity. They are very brittle. Their density is low.
Nonmetals are basically the opposite of metals.
Metalloids are in between metals and nonmetals. They have fair conductivity and density.
Groups are the vertical rows on the Periodic Table. They tell us how many valence electrons are in each element.
We find the number of valence electrons in the group number. Those are the vertical rows described above.
Metals on the Periodic Table can be found on the left side of the zig-zag line. They contain the most reactive elements.
Nonmetals can be found on the right side of the zig-zag line. They contain the least reactive elements.
Metalloids are found along the zig-zag line spoken of above. Although not all of the elements touching the line are classified as metalloids. (Aluminum & ununseptium)
The atomic number tells us how many protons and electrons are in the element. They are arranged in order from highest to lower number.
The atomic mass can be found towards the bottom of the element. It contains the number of neutrons. But you have to subtract the # of protons from the atomic mass to get the correct number of neutrons.
The most reactive group of elements are in the first. As they move further right on the Periodic Table, they become less reactive. The Noble Gases are the least reactive elements. They have no reaction at all.
Metals can be filed into thin sheets known as foils. Metals happen to be good conductors because they have free electrons. They have the highest density and are the heaviest.
Nonmetals have very poor conductivity. They are very brittle. Their density is low.
Nonmetals are basically the opposite of metals.
Metalloids are in between metals and nonmetals. They have fair conductivity and density.