science - Atoms elements and compounds Flashcards
what are the building blocks of substances
atoms
can atoms be destroyed
no
when atoms join together what are they called
molecules
how many types of atoms are elements made of
1
when atoms exist as pairs what is it called
a diatomic molecule
what is the list of elements called
the periodic table
how is the periodic table grouped
with elements of similar properties
what is a compound
elements combined in a chemical reaction
what is the name of the compound that contains copper and sulphur
copper sulphate
can matter be created or destroyed
no , only changed from one form to another
when chemical reactions happen does the number of atoms change
no
which is easier to reverse , chemical change or physical change
physical
give an example of a physical change reaction
dissolving
