Periodic Table Flashcards
What is the periodic table?
A list of all known elements.
How is the periodic table organized?
Its organized by increasing atomic number.
What are the 3 types of elements on the periodic table?
Metals, Non-metals, and Metalloids.
What is on the left side of the periodic table?
The metals with the greatest metallic properties.
What is on the right side of the periodic table?
The elements with the least metallic properties (Non-metals)
What are the elements in the middle of the periodic table?
Transition elements (properties change from metals to non-metals)
What are metalloids and where are they?
Metalloids are a small group of elements that zigzag between the metals and nonmetals. They have both metallic and nonmetallic propertices.
What are the vertical columns on the periodic table called?
groups or families
What are the horizontal rows on the periodic table called?
periods
If two elements are in the same group or family, what do they have in common?
They have the same number of valence electrons (what determines the elements chemical properties including reactivity)
Where are the valence electrons on the atom?
They are on the outer layer of the atom.
How many groups or families are there?
18
What makes hydrogen special?
It doesn’t belong in any groups, its very reactive, colorless, odorless, and only has one valence electron.
What is group 1?
Alkali metals (extremely reactive, shiny, silver, low density, and soft)
What is group 2?
Alkaline - earth metals (Slightly less reactive, silver, slightly more dense)
What are groups 3-12?
Transition metals (moderate range or reactivity, wide range of properties, usually shiny, good conductors of heat and electricity). Have 1-2 valence electrons.
What and where are Lanthanides and Actinides?
Located at the bottom, these are also transition metals. Lanathanides are shiny and reactive. Actinides are radioactive and unstable.
What is group 13?
Boron (Reactive and have 3 valence electrons (group num - 10))
What is group 14?
Carbon (have varied reactivity)
What is group 15?
Nitrogen group (varied reactivity)
What is group 16?
Oxygen group (reactive)
What is group 17?
Halogens ( all non metal, very reactive, poor conductors, form salts with metals)
What is group 18?
Noble gases (all non metal, unreactive, colorless, odorless)
How many valence electrons does Helium have?
2
Whats the metalloid sequence?
Starts at boron then goes two going down one three times.
