elements
What is atomic #1
Hydrogen
What is water
H20
What is an Exothermic Reaction?
Reaction that releases heat
What are Periods?
Rows are called
What is 7 for water?
The pH of neutral water
What element do humans use to breath
Oxygen
What is carbon Dioxide?
CO2
What is an Endothermic Reaction?
Reaction that absorbs energy
What are Groups?
Columns are called
What is Carbon Dioxide?
Gas plants use for photosynthesis
What is the symbol Na
What is salt?
Sodium chloride
What is Combustion?
Burning fuel in oxygen
What are Metals?
Elements on the left side are mostly
What is an Atom?
Smallest unit of matter
Heaviest natural element
Uranium
What is ammonia?
NH₃
What is Double Replacement?
Two substances swap ions
What are Transition Metals?
Center block elements
What is pH?
Measure of acidity/basicity
It is a liquid metal at room temperature.
mercury
What is Methane?
CH₄
What is Electrolysis?
Breaking compounds using electricity
What are Noble Gases?
Far right column elements
Who is Dmitri Mendeleev?
Scientist who created periodic table