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Unit b-2 vocab
For the study guide
Term | Definition |
---|---|
State of matter | solid liquid or gas |
solid | When particles have low energy and have a high pull |
liquid | when particles have medium pull and energy |
gas | When particles have high energy and low pull |
atom | Smallest unit of mass makes up everything |
proton | A particle in an atom with a posotive charge |
neutron | A particle in an atom with no charge |
nucleas | core of the atom |
electron | outside the atom has negative charge |
electron cloud | cloud of electons orbits the nucleas |
valence electron | Electon formed from hydorgen or carbon |
periodic table | Table with all of the scientific elements on it |
reactivity | How the element reacts with certain elements |
atomic number | The number given on the periodic table |
mass number | The mass goven on the element on the periodic table. Is exact |
atomic mass | neutrons plus protons |
element | something that is made up of certain kinds of atoms |