The chemical formula for carbon dioxide
CO2
H2O
a positively charged particle in the nucleus of an atom.
proton
a neutral particle in the nucleus of an atom
neutron
a negatively charged particle that occupies the space in an atom outside the nucleus
electron
The temperature at which an element or compound changes from solid to liquid.
Melting Point
neither acid or base (ex. pure water has a PH=7)
neutral
a change in matter in which the substance that makes up the matter change into other substances.
chemical change
a row of the periodic table
period
a change in the size, shape, form, or state of matter that does not change the identity of the matter.
physical change
mass per unit volume of an object or substance
density
the common name for NaCl
table salt
# of protons and electrons that are in an atom of Hydrogen
1 proton
1 electron
The number of protons in an atom of an element (the "identity" of a substance)
atomic number
a substance containing atoms of two or more different elements chemically bonded together.
compound
Name 3 physical properties
malleability, ductility, conductivity, solubility, density, color, texture, luster, melting point, boiling point, etc.
new substances formed in a chemical reaction
products
made up of two or more substances but not chemically combined
mixture
What can cause a chemical reaction to happen quicker?
increase temperature
Which reaction cannot be reversed? Physical or Chemical
Chemical
Name 3 chemical properties
rust / oxidation state, flammability, combustibilty, pH (acid/basic), reactivity, toxicity
ability of a substance to bend without breaking
malleability
the ability of a substance to be pulled into thin wires
ductility
Number of protons, neutrons and electrons in Potassium

19 - protons
19 - electrons
20 - neutrons
How to find the number of neutrons in an element?
Subtract the atomic number from the atomic mass