element, mixture and compounds Flashcards
what is an Element?
a substance made from only one type of atom
what is a compound?
a substance made from two types of atom which are chemically bonded
what is a mixture?
a mixture is a substance where there are more than one type of atoms but NO bond
what is an atom
an atom is the smallest particles of a substance
How many elements are there on the periodic table?About 100About 1000About 250
About 100 elements
what state do elements come in ?solid, liquid or gas OR elements, mixtures or compounds
some elements are solids like gold, some are liquid like mercury others are gasses like oxygen
Each element has a symbol.True or False ?
Truethe symbol for Oxygen is O, for Hydrogen it is H and for gold it is Au.
in the periodic table the elements are listed in groups ( the vertical columns). Why are they in this pattern?
Elements in the same group have similar properties.
when two or more elements join with a chemical bond we make a … ?
Compound
if i have a pure element how many types of atoms do i have?
one
why is it difficult to separate a compound?
the elements have formed a chemical bond
which of these is an element?watergold
gold
which of these is a compound ?watergold
water
what is the smallest particle of all things called?
an atom
