| Term | Definition |
|---|---|
| Matter | Anything that has mass and takes up space. |
| Mass | The material that matter is made up of. |
| Volume | How much room/volume matter takes up. |
| Density | D=m/v The amount of material/stuff matter takes up within a specific space. |
| Atom | The smallest part of an element, the building blocks to all matter. |
| Electron | Negatively charged particle of an atom that circles the nucleus and has an attractive force that bonds other atoms to create everything. |
| Proton | Positively charged particle of an atom found inside the nucleus. |
| Neutron | Particle of an atom with a neutral charge, no charge inside the nucleus. |
| Periodic Table | A large grid that identifies and classifies all of the elements by their chemical and physical properties. |
| Element | The simplest substance that can be created but can not be broken down/makes up all of the universe. |
| Periods | Rows that tell how many energy levels(orbitals)each element has for the electrons to move around it. |
| Groups or Family | Columns that show how many valence electrons an element has/The number of electrons that is aloud to move on the outer shell. |
| Valence Electrons | The electrons that move on the outer shell. |
| Atomic Number | How many protons an element has inside the nucleus/usually the same amount of neutrons and electrons. |
| Atomic Mass | the measurement of the mass for an elements atoms. |
| Chemical Property | Change into a whole new substance,change of color. |
| Physical Property | The state of matter it's in,the size,shape,color,and texture. |
| Ionic Bond | The actin when elements either lose or gain an electron during bonding. |
| Covalent Bond | When elements share electrons during bonding. |
| Reaction | Elements bond together through the attractive force of electrons creating some type of reaction and change. |
| Compound/Molecule | Two or more elements combine together in a specific ratio/pattern creating a whole, new and different substance. |
| Mixture | Two or or more elements physicaly combine, keeping there original properties. |
| Nobel Gases | All of the elements in group #18-these are most stable becausee all have 8 electrons in there outer shell. |
| Halogens | All of the elements in group #17-they are very reactive, bonding easily with elements in group #1 because they have seven valence electrons. |
| Alkali Metals | All of the elements in group #1–They are vvery reactive because they only have one valence electron. |
| Metalloids | Elements between matals and non-metals that can react either way, they have 3–7 valence electrons. |
