|
|
This is only a preview of the paper
Click here to register and get the full text.
Existing members click here to login
|
|
|
Matter and Energy Elements- smallest thing matter can be broken down into. Chemical rxn: NaCl > Na + Cl (decomposition reaction) Each element has a unique symbol 90 elements exist in nature Compound- combination if 2 or more elements A particular compound will always combine in the same mass ratio Water reaction in a 1: 8 ratio ***** know elements 1-36 mixture- combination of elements and/or compounds elements and compounds are pure substances Types of mixtures: Homogeneous- same ratio throughout. Example. Milk Requires physical change to separate Heterogeneous- opposite. Example chocolate chip cookie, pepperoni pizza Reactants: - put in sealed vessel } Law of Conservation - after rxn they are the same weight } of Mass In a given chemical compound the elements combine in the same proportion by mass Atomic Theory (John Dalton) 1. Matter consists of tiny particles called atoms. 2. Atoms are indestructible; instead they arrange to form. 3. The atoms of 1 particular element are the same in mass y otra properties as any other.
Approximate Word count = 633
Approximate Pages = 2.5
(250 words per page double spaced)
|
|
|
|
|
|