Element basics
what is the most abundant element in the world
hyrdogen
This is the symbol for oxygen.
O
These vertical columns in the periodic table contain elements with similar properties.
groups
Most elements on the periodic table fall under this classification.
Metals
The element with the chemical symbol He.
helium
The number of protons in an atom determines this.
atomic number
This element has the symbol Na.
sodium
The group that contains elements like fluorine and chlorine.
Group 17
This category includes elements that are poor conductors and often brittle.
Nonmetals
This is the lightest noble gas.
helium
This part of the periodic table tells you the number of electron shells in an atom.
The symbol for gold.
Au
Elements in the same period have the same number of these.
Energy levels, Or shells
This zig-zag line separates metals from nonmetals and contains this class of elements.
Metalloids
This gas makes up about 78% of Earth’s atmosphere.
nitrogen
This is the only element that is a nonmetal but sits in group 1
hydrogen
The symbol for the element with atomic number 12.
Mg (magnesium)
This group contains elements that are all gases and rarely react.
Group 18
This metalloid is used in electronics and solar panels.
silicoin
This element is needed to make bones strong and has the symbol Ca.
Calcium
This element is a liquid at room temperature.
bromine
This element has the symbol K but its name doesn’t start with the letter K.
potassium
What do we call the two rows at the bottom of the periodic table?
lanthanides and actinides
This nonmetal can form diamond and graphite
carbon
The only letter not used in any element symbol.
J