Question | Answer |
What is an atom? | The basic particle from which all elements are made. |
What are the 2 main parts of an atom? | The nucleus , protons and neutrons, surrounded by electrons. |
What is the basic structure of an atom? | A nucleus surrounded by electrons. |
What is a molecule? | A molecule is when 2 or more atoms are chemically combined by a bond. |
What is the relationship between an atom and a molecule? | Molecules are made of atoms. |
What is the periodic table? | The periodic table is a table of elements, showing the symbols for elements, full names, atomic numbers and mass numbers. |
What is the symbol for am element? | The symbol is 1 or 2 letters that are used to show a chemical element. |
What is an element? | An element is a pure substance. |
What is a compound? | A compound is when 2 or more elements are chemically combined. |
What is a chemical change? | A chemical change is when a substance is changed into another substance, it can't be reversed. |
What is a physical change? | A physical change is when a substance changes it's apperence, not it's substance, it can be reversed. |
What is a chemical reaction? | A chemical reaction is the process that leads to a chemical change. |
What is a reactant? | A reactant is a starting material. |
What is a product? | A product is what you end up with. |