Matter and density
Anything that takes up space and has mass.
Matter
The atomic # is equal to the ______
the number of protons and the number of electrons.
A mixture where the components that make up the mixture are evenly distributed throughout the mixture.
Homogeneous mixture
A measure of how acidic or basic a solution is.
pH
A type of matter that cannot be broken down into another substance by chemical reactions.
Element
If iodine has an atomic # of 53 what is the number of protons?
53
Two liquids that are insoluble in each other. (ex. oil and water)
immiscible
A substance that has an excess of H atoms and, therefore donates its hydrogen atoms, H+ to other substances. (tastes sour)
acids
A neutral subatomic particle that is found in the nucleus of an atom.
Neutron
If the number of electrons is 59, what is the atomic #?
59
The process by which a gas, liquid, or solid is homogenously spread within a gas, liquid, or solid without chemical change.
Solution
True or False:
A change of 1 pH unit represents a 2 fold change in the acidity of the solution.
False
A change of 1 pH unit represents a tenfold change in the acidity of the solution.
Find the density d=m/v
A piece of asphalt has a volume of 54 cm3 and a mass of 108 g. What is its density?
2 g/cm3
To get the number of neutrons you need to___
Subtract the atomic mass with the atomic number
n=atomic mass- atomic #
During a solution, the liquid that is doing the dissolving is _____
solvent
Water is the universal solvent
A solution that has an excess of OH atoms.
Base
Find the density: d= m/v
A stainless steel knife has a volume of 2.5 cm3 and a mass of 19 g. What is its density?
7.6 g/cm3
If zinc has an atomic # of 30 and an atomic mass of 65, what is the number of neutrons?
35
What does it mean to dissolve?
To form a solution (end result) by mixing it with a liquid.
When a substance has equal concentrations (amounts) of H and OH atoms is _____
neutral