Key Terms
What is Matter?
Matter is whatever has a mass and takes up space.
What is an atom?
It is a fundamental part of matter. It is a cute tiny unit of matter.
Is He an molecule,atom or compound?
It is an atom/molecule
What is a pure substance?
Pure substances are substances that are made up of only one type of atom or molecule.
it is a physical change
What is chemistry?
Chemistry is the study of matter and its changes!
are elements on the periodic table atoms?
Yes, the periodic table is made up of atoms
Is NaOH a element, atom, or compound
it is a compound.
Is burning something a chemical or physical change?
Chemical
In lab you mixed 2 solutions and it made a giant explosion, what type of change is this?
It is a chemical change.
What does Homogenous mean?
What is a compound?
are substances composed of more than one element, bound together in fixed ratios.
What makes Na an atom/molecule and not a compound?
It is by itself and not bonded to other atoms/elements
Is making a smoothie, and blending the fruit a chemical or physical change?
It is a physical change (nothing was chemically changed)
is cookie dough heterogenous or homogenous mixture?
it is a heterogenous mixture
What is heterogenous?
A mixture/solution that isnt uniform. meaning you can see the separate components.
what is an element?
2 or more atoms bonded to each other
is water (H2O) a uniform homogeneous solution or a heterogeneous solution?
It is a homogenous solution.
Examples of chemical changes present during a lab
-burning/flame
-reactive
-rusting
-cooking
-melting
-shredding
-boiling
is water heterogenous or homogenous?
It is homogenous. solution/mixture
is NaCl2 an atom,element,or compound?
it is a compound.
Is air a mixture/pure substance?
it is a pure substance since it is O2
Is Cl2 a molecule or an atom?
It is a molecule
is a homogenous mixture only liquids, or is it solids and liquids?
it is both, metals are mixed make them solid, and water is a homogenous mixture of hydrogen and oxygen that turns liquid.