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Elements
Chapter 17
Question | Answer |
---|---|
What is an element | an element is made up of only one type of atom |
elements are listed on | the periodic table |
who discovered that all the atoms in an element are the same | Robert Boyle |
what is a molecule | two or more atoms chemically combined |
is water an atom or a molecule | a molecule |
what is a compound | two or more elements chemically combined |
what is the formula for salt | NaCl |
what is the symbol for sodium | Na |
What is the symbol for chlorine | Cl |
what is a mixture | two or more things mingled together but not chemically combined |
when iron and sulphur are heated | iron sulphide is formed |
is seawater a mixture or a compound | a mixture |
if elements in a substance are in the same ratio always this substance is a | compound |