Question | Answer |
Matter | Anything that takes up space and has mass. |
Mass | The material that matter is made up of. |
Space/Volume | How much room/space matter takes up. |
Density | D= m/v The amount of material/stuff matter takes within a specific space. |
Atom | Smallest part of an atom. |
Electron | Particle of an atom with a negative charge, moves around the nucleus and has an attractive force that allows it to bond with other atoms creating everything in the universe. |
Proton | Partial of an atom with a positive charge located inside the nucleus. |
Neutron | Particle of an atom with a neutral /no charge located inside the nucleus along with the proton. |
Periodic Table | Large grid that identifies and classifies all of the elements by there chemical and physical properties. |
Element | the simplest substances that cannot be broken down /they make up all matter in the universe. |
Periods / Rows | rows that tell how many energy levels each element has for the electrons to move around. |
Groups Or Family /Column | Columns that tell how many valence electrons each element has /the number of electrons that can move on its outer shell /energy level. |
Valence Electrons | The electrons that move on the outer shell /energy level of an atom. |
Atomic Number | How many protons an element has inside the nucleus /usually is same # of neutrons and electrons. |
Atomic Mass | The measurement of the mass for an elements atom. |
Chemical Properties | The ability of substances to combine with one another forming new and different compounds and molecules. |
Physical Properties | The state of matter and appearance of a substance. |
Ionic Bond | When elements either lose or gain an electron during bonding. |
Covalent Bond | When elements share electrons during bonding. |
Chemical Change / 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 substance /compound. |
Mixture | Two or more substances combine together keeping their original properties, they DO NOT CHANGE into a new substance compound. |
Noble Gases | All of the elements in Group #18 -they are the most stable elements because they have 8 electrons in their outer shell. |
Halogens | All of the elements in Group #17 -they are very reactive bonding easily with elements in Group #1 because they have 7 valence electrons and want to be stable. |
Alkali Gases | All of the elements in Group #1- they are very reactive because they only have one valence electron. |
Metalloids | Elements between metals and non-metals that can react either way, they have 3-7 valence electrons. |
Endothermic | Chemical reaction that takes in energy |
Exothermic | Thing that change out of we have no control |