Element Groups
The largest amount of elements are found in this elemental group
transition metals
smallest part of an element
atom
the small number at the top of the element
atomic number
This is used in toothpaste that is also a gas
Who created the periodic table over the course of a weekend?
Dmitri Mendeleev
this group is known for its "royal" name
Noble gases
the center of the atom
nucleus
this number tells how much an element weighs
atomic mass / weight
This gas was used in the 80s for business signs and came in many different colors
Neon
Groups and Periods
The most reactive of the elemental groups
Alkali Metals
the negatively charged part of an atom
electron
Atoms of the same element but different mass number
This group of gases are the most poisonous of all element groups
Halogens
In order for scientists to determine how old something is, what element is used
Carbon-14
Man-made or synthetic elements
Actinides
positive charged part of an element
proton
when 2 or more atoms combine
Molecule
Which gas was used in times of war to create mustard gas
Chlorine
How many elemental groups are there on the periodic table
9
metalloids
anion
when an element GAINS an electron
118
Each gas in this group creates a different color when heat is applied
Noble Gases
List the Alkali Metals in order of MOST reactive to LEAST reactive
Fr
Cs
Rb
K
Na
Li