chapter 1- introduction to matter Flashcards
(25 cards)
what is chemistry
the study of the properties of matter and how matter changes
what are elements
a substance that cannot be broken down into any other substances by chemical or physical means
what are elements called
the building blocks of matter
what are atoms
tiny particles that make up an element
what is a symbol
a one-or-two-letter set of characters used to identify an element
what is a compound
a substance made up of 2 or more elements chemically combined in a specific ratio
what is a formula
a combination of symbols that shows the ratio of elements in a compound
what is a mixture
made from 2 or more substances- elements, compounds, or both- that are together in the same place but do not make a new substance
physical change
a change that alters the form or appearance of a material but dies not change the material into a new substance
what is a chemical change or reaction
a change in matter that produces a new substance
what are the two ways that matter can change
physical and chemical changes
what is matter
anything that has mass and takes up space
what is weight
a measure of the force of gravity on you
what is mass
the measurement of how much matter an object contains
what is the unit to measure mass
grams
what is volume
the amount of space that matter occupies
what is the formula for volume
lxwxh=v
what is density
the measurement of how much mass is contained in a given volume
what is the formula for density
d=m/v
who is democritus
credited to be the first to think matter is formed of small pieces he called it atoms
dalton test his ideas
yes
can atoms be broken down into smaller pieces
no
are all atoms alike in an element
yes
what is a chemical bond
the force that holds atoms together
