matter️️anything that has mass and takes up space
atoms️️-the building blocks of matter
-the simplest part of an element
element️️-each one is made of the same kind of atom
-cannot be broken down any further by chemical means
currently there are ___ elements️️115
chemical symb...
Honors Chemistry Chapter 2 with comprehensive Questions and
Answers
matter✔️✔️anything that has mass and takes up space
atoms✔️✔️-the building blocks of matter
-the simplest part of an element
element✔️✔️-each one is made of the same kind of atom
-cannot be broken down any further by chemical means
currently there are ___ elements✔️✔️115
chemical symbol✔️✔️-1 or two letters
-first letter always capitalized, the second never, chemical "shorthand"
-most are derived from either Latin or Greek
-some are named after famous scientists
-even countries, states and even planets show up as the name of elements
compound✔️✔️-made of two or more different kinds of elements chemically combined
-can be broken down into more elemental particles
-when broken down, the pieces have completely different properties than the original
chemical formula✔️✔️-a short hand method used to show the number and type of atoms present in
a compound
subscript✔️✔️-represents the number of atoms
, How many hydrogen atoms are in water?✔️✔️2
What are the two different things matter can be classified as?✔️✔️1.) substance
2.) mixture
substance✔️✔️a type of matter that has uniform (all the same) and has a definite composition
two types of substances✔️✔️1.) elements
2.) compounds
mixture✔️✔️-made up of two or more substances that are not chemically combined
-has a variable composition
heterogeneous✔️✔️mixture is not uniform in composition (contains visibly different parts)
homogeneous✔️✔️-same composition throughout
-called "solutions"
-mixed molecule by molecule (does not contain visibly different parts
-can occur between any state of matter
separating mixtures✔️✔️-mixtures go back to original components
-this can be done to most heterogenous by physical means
distillation✔️✔️separates homogeneous mixture on the basis of differences in boiling point
physical properties✔️✔️a property of matter that can be observed without changing a substance
into another substance
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