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Elements comp/mix
junior science ch 17
Question | Answer |
---|---|
what is a mixture | two or more substances mingled together but not chemically combined |
What is a compound | two or more different elements combined together and chemically combined. they contain two or more different types of atoms |
What is an atom | the smallest part of an element which still has the properties of that element |
what is an element | a substance that cannot be split up into simpler substances by chemical means. a substance made of only one type of atom |
What is the periodic table | a list of all the elements which exist |
what is a molecule | two or more atoms chemically combined |
What elements are found in water | Hydrogen and Oxygen |
What is the symbol for tungsten | W |
how many atoms in a molecule of carbon dioxide CO2 | 3 |
What is the symbol for salt | NaCl |
Elements are made of | one type of atom |
Marie Curie discovered two elements called | Polonium and radium |
all elements are listed on the | periodic table |