click below
click below
Normal Size Small Size show me how
Grade 9 Science 4RJ2
RJs Study Stack for Chemistry
Question | Answer |
---|---|
Mass | the amount of matter in something |
Chemical reaction | a process that rearranges the molecular structure of matter |
Chemical change | a change in the starting substance and a production of one or more new substances |
Sublimation | from solid to gas or gas to solid |
Electron | a subatomic particle with negative charge and is on the outside of the atom |
Nucleus | both the neutrons and protons in the middle of an atom |
Metals | a substance that is shiny, malleable, hard, good conductor of heat and electricity |
Volume | how much space an object takes up |
Element | a substance that is made up of one type of atom |
Suspension | a fluid that is made up of different types of solid particles (at least two) |
Proton | a subatomic particle that has the positive charge that is in the middle of an atom |
Periods | a row on the periodic table (7 of them) |
Metalloids | elements that have the qualities of a metal and a non-metal (ex. silicon) |
Density | mass per unit volume of a substance |
Atom | the smallest unit of an element |
Solute | the substance that is being dissolved in a solution |
Solvent | the substance that is doing the dissolving in a solution |
Solution | two or more substances mixed together where you cannot see the different parts. |
Neutron | the subatomic particle that has no charge and might be in the nucleus with a proton |
Covalent bond | two different atoms are sharing electron and causes them to be linked together. This helps them to have a full outer shell. |
Non-metals | an element not having the character of a metal. Do not conduct well, not shiny, very brittle |
Chemical formula | notation that indicates the type and number of atoms in a pure substance |
Compound | a couple of different types of elements making up a pure substance |
Chemical equation | a symbolic representation of a chemical reaction |
Ionic bond | a bond between a positive ion and a negative ion that results in a neutral charge. Opposites attract |
Qualitative | shows the qualities of a substance and has nothing to do with numbers (example how it smells, feels, tastes) |
Quantitative | the qualities of a substance that has something to do with numbers (you can measure this) for example how big it is, mass. |