Compounds And Molecules Flashcards
Molecule
Smallest unit of a compound
Atom
Smallest unit of an element
Compound
2 or more elements chemically combined
Element
Made up of only 1 type of atom
Chemical formula
Explains the type and number of elements in a compound
Covalent bond
A chemical bond that occurs when 2 atoms share an electron
Chemical bond
A bind that holds 2 atoms together in a compound
Ionic bond
A chemical bond that occurs when one atom gives an electron to another atom
Positive ion
When an atom loses one or more electrons
Valence electron
An electron in the outer shell of an atom
Ion
A charged atom that has gained or lost electrons
Negative ion
When an atom gains one or more electrons
Water
H2O
Stomach acid
HCl
Carbon Dioxide
CO2