Question | Answer |
Pure substance | A substance that contains only one element or compound |
Mixture | A substance that contains different compounds and/or elements |
Homogeneous mixture | A mixture with a composition that is always the same no matter what part of the sample you are observing |
Heterogeneous mixture | A mixture with a composition that is different depending on what part of the sample you are observing |
Chemical change | A change that affects the type of molecules or atoms in a substance |
Physical change | A change in which the atoms or molecules in a substance stay the same |
The phases of matter are | Solid, Liquid and Gas |
The kinetic theory of matter states | That molecules and atoms are in constant motion, and the higher the temperature, the greater their speed. |
The homonuclear diatomics are | nitrogen, oxygen, chlorine, fluorine, bromine, iodine |
A chemical change is called a | chemical reaction |
The atoms and molecules on the left of the arrow are the | reactants |
The atoms and molecules on the right of the arrow are the | products |
If a chemical equation is not _______, then it is not correct | balanced |
You can only change ______ when balancing an equation, not _____ | coefficients, subscripts |
Name the first homonuclear diatomic | nitrogen N2 |
Name the second homonuclear diatomic and its chemical symbol | oxygen O2 |
Name the third homonuclear diatomic and its chemical symbol | chlorine Cl2 |
Name the fourth homonuclear diatomic and its chemical symbol | fluorine F2 |
Name the fifth homonuclear diatomic and its chemical symbol | bromine Br2 |
Name the sixth homonuclear diatomic and its chemical symbol | iodine I2 |