Atoms And Rocks Flashcards
What do atoms have in a small nucleus?
Protons and Neutrons
What orbits around the nucleus in an atom?
Electrons
What is the mass number of an element equal to?
The number of protons+number of neutrons
What are all substances made from?
Atoms
How much net charge does an atom have?
None
How many types of atom does an element consist of?
One
What are elements arranged into?
The periodic table
What can two atoms of the same element join together to form?
A molecule
What does a compound consist of?
Atoms of two or more different elements joined together
What is formed when atoms share electrons?
A covalent bond
What type of bond is formed when atoms loose or gain electrons?
An ionic bond
Why are ionic bonds formed?
So atoms become oppositely charged ions that attract each other
What shows an atoms number of electrons and their arrangement in shells?
Electronic configuration
What are stable atoms?
Atoms with a full outer shell of electrons
What is calcium carbonate?
Limestone
What does limestone/calcium undergo when it’s heated?
Thermal decomposition
What is the word equation for calcium carbonate undergoing thermal decomposition?
Calcium carbonate ~> calcium oxide (quicklime) + carbon dioxide
What can limestone be used to make?
Cement, mortar, concrete and glass
What is carbon dioxide bubbled through to make a milky suspension of calcium carbonate?
Limewater, calcium hydroxide
What is the symbol equation when carbon dioxide is bubbled through limewater, calcium hydroxide which gives a milky suspension of calcium carbonate?
CO2+Ca(OH)2 ~> CaCO3+H2O
