Term | Definition |
Matter | Anything that takes up space and has mass and takes up space. |
Mass | The material that matter is made up of it can be measured. |
Space/Volume | The specific area or lace 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 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 | |
Nuetron | |
Periodic Table | |
Element | |
Periods/rows | Rows |
Groups/Colums | 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 also known as the energy level of an atom. |
Atomic number | How many protons an element has inside the nucleus usually is the 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 molecules. |
Physical property | The state of matter and appearance of a substance. |
Iconic 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 combined together in a specific ratio/pattern creating a whole, new and different substance. |
Mixture | Two or more substances combined 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. |
Halogenes | 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 have only one valence electron. |
Metalloids | Elements between metals and non metals that can react either way, they have 3-7 valence electrons. |