Elements and Compounds Flashcards
(22 cards)
what is an element?
a substance that cannot be broken down into other substances because it is made up of only 1 atom type
how many elements exist naturally?
92
where can you find a list of all the elements?
in the periodic table
what is an element?
a substance that cannot be broken down into other substances because there is only one type of atom inside an element
how many elements are there that exist naturally?
92 but scientists have made a few more
where can you find a list of all the elements?
in the periodic table
what does every element have?
a unique chemical symbol
are all the atoms the same as each other in one single element?
yes
what is the smallest part of an element that can exist?
the atom
if there are 92 naturally occurring elements, how many types of atoms are there?
92
one atom ______ melt, a _____ of atoms ___
cannot, group, can
can there be 2 elements that have a similar atom in them?
no, the atoms in one element have to to different from any other element
the properties of an element are the properties of a _____ of atoms joined together
group
what 2 elements is water made up of?
H2O, Hydrogen and Oxygen
what are compounds?
2 or more elements that are chemically joined to create a substance
the properties of the compound are _________ to the properties of the elements it is made up of
different
what do the properties of a compound depend on?
the atoms
do the number of atoms make a difference to the properties of a compound?
yes they do
if there are 2 elements, 1 aluminium and 1 oxygen, what would the name of the compound be?
aluminium oxide
what elements is zinc oxide made up of and how many?
1 zinc and 1 oxygen
if there are 2 elements, 1 carbon and 1 oxygen, what would the name of the compound be?
carbon monoxide
what elements is carbon dioxide made up of and how many?
1 carbon and 2 oxygen
