Groups
These elements are shiny, soft, and highly reactive metals, none of which occur as free elements
What are the alkali metals?
The characteristic originally used to order the elements on the Periodic Table
What is atomic weight/mass?
The columns on the Periodic Table
What are groups?
Element that makes up 65% of the human body
What is oxygen?
The atomic number of carbon
What is 6?
These elements are all odorless, colorless, monoatomic gases with a very low chemical reactivity
What are the noble gases?
The ancient Egyptians used a compound of this element, stibnite, as eye makeup
What is antimony?
Category of elements that are shiny, solid, and good conductors of heat and electricity
What are metals?
Element that is radioactive and can enter homes through basements after radioactive decay of rocks below the earth
What is radon?
The atomic weight of silver
What is 107.87?
A large group of metals in the center of the periodic table, they are less reactive than group 1 & 2 metals and have high melting points and densities
What are the transition metals?
The village in Sweden where many elements were discovered in mineral ores
A mixture of metals
What is an alloy?
The only element named after someone who is still alive
What is oganesson?
These groups are referred to as the main group elements
What are groups 1-2 and 13-18?
These elements are all solids apart from nitrogen, and are a mix of non-metals, metalloids, and a metal
What are the pnictogens?
The scientist who originally developed the Periodic Table (first and last name)
Who is Dmitri Mendeleev?
Compounds formed when metals react with water
What are (metal) hydroxides?
The metal with the highest melting point
What is tungsten?
The period holmium is in
What is period 6?
These elements are almost all metals, known as "poor metals" due to their low melting points and hardness
What are the icosagens?
The ten oldest elements discovered
What are copper, lead, gold, iron, silver, carbon, tin, sulfur, mercury, and zinc?
An organization of the elements by increasing atomic number and into periods and groups
What is the Periodic Table?
The two actinoids used for nuclear power
The least reactive alkali metal
What is lithium?