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Science Terms
Periodic Table
| Term | Definition |
|---|---|
| Matter | anything that has mass and takes up space |
| Mass | The material/ stuff that matter is made up of-it can be measured |
| Space/Volume | The specific area/place that matter takes up |
| Density | D=m/v The amount of mass in a specific volume of space |
| atom | smallest part of an element,the building blocks of all matter |
| electron | particle of 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 | Particle of an atom with a positive charge located inside the nucleus |
| Nuetron | particle of an atom with a nuetral/no charge located inside the nucleus along with the proton |
| Periodic Table | large grid that identifies and classifies all of the elements by their 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 elements has for the electrons to move around |
| groups or family/columns | 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 of an element has inside the nucleas/usually is same # of neutrons and electrons |
| atomic mass | the measurement of the mass for an elements atoms |
| chemical property | the ability of substances to combine with one another forming new and different compounds and molocules |
| physical property | 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 action and change |
| compound/ molocule | two or more elements combine together in a specific ratio/ pattern creating a whole, new and different substance |
| Mixture | two or more substances combine together keeping their original properties, they DO NOT CHANGE into a new substance/ compound |
| Nobel Gases | all of the elements in group #18 - they are the most stable elements because they have eight 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 seven valence electrons and want to be stable |
| Alkali Metals | 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 |
Created by:
daleea_dafney03
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