Chapter 2 Flashcards
Atomic mass =
Protons + neutrons
Isotope
The atoms of the same element w/ different # of electrons
Law of conservation of mass
Mass can not be created or destroyed in a chemical reaction
Law of constant composition / definite proportions
Composition of compound doesn’t change / a compound has a fixed ratio of elements
Law of multi proportions
2 or more compounds of the same elements if comparing the mass of the other you get a small whole # ratio
Daltons atomic theory
Matter is made up of atoms
Small indivisible particles
Atoms of a given elem have the same mass
Compounds are formed from more than one type of atoms in a fixed mixture
Sub atomic particles
Protons charge +
Neutron no charge
Electrons charge -
Metal properties
Shiny malleable ductile conduct heat and electricity solid at room temp except Mercury Hg k
Non -Metals
Poor heat and electricity conductors brittle all physical states
Columns
Groups have similar chemical properties and physical properties
Periods
Rows
Molecules
2 or more atoms held together by covalent bonds
Covalent bonds
Sharing of non metals
Poly atomic elements
Phosphorous P4
Sulfur S 8
Molecular formula
The actual # of atoms of each molecular element in one moleculeC6H12O6
