click below
click below
Normal Size Small Size show me how
Grade 5 E-2 Sci. Def
Chapter 2 Atoms and Elements
Term | Definition |
---|---|
nucleus (cell) | The organelle that controls all of a cell's activities |
proton | A subatomic particle with a positive charge |
neutron | A subatomic particle with no charge |
electron | A subatomic particle with a negative charge |
element | A substance made up of only one kind of atom |
atom | The smallest unit of an element that has all the properties of that element |
molecule | A grouping of two or more atoms joined together |
periodic table | The table of elements in order of increasing atomic number; grouped by similar properties |
compound | A substance made of the atoms of two or more different elements |