Acids, Bases, Neutral
what is the ph of an acid?
anything lower than 7
atomic number tells us the number of ______. We can find this number at the ______ of the box.
protons, top
when two or more atoms are joined together by a chemical bond.
molecules
Atomic _______ increases from left to right on the periodic table
number and mass
ice melting
physical- we can freeze it to turn it into ice again
what is the ph of a base
anything higher than 7
Atomic mass tells us the # of __________ + __________. It is found at the _______ of the box
protons + neutrons
found at the bottom of the box
what is doing the dissolving (milk in chocolate milk)
solvent
left
wood burning
chemical- we cannot get the original wood back, it has been chemically changed
what is neutral
7
Protons have a _ charge and are found _
neutrons have a _ charge and are found _
electrons have a _ charge and are found _
positive, in the nucleus
neutral, in the nucleus
negative, in the electron cloud/orbital shells
what is being dissolved (chocolate powder in chocolate milk)
solute
why don't the noble gasses (group 18) react with other elements
because they have a full outer shell
Combining hydrogen and oxygen to make water
chemical- taking two different substances and combining them chemically
what element is increased in an acid
Hydrogen (H+)
valence electrons are found ________ and each group/period has the same # of valence electrons
outermost shell, group (vertical columns)
A homogeneous mixture where one substance called the solute is fully dissolved into another substance called the solvent.
solution
has both properties of metals and nonmetals
Metalloid
Your friend decides to toast a piece of bread, but leaves it in the toaster too long. The bread is black and the kitchen if full of smoke. This is an example of a ....
chemical- we can't get raw bread back after toasting/burning it. It has been chemically changed
what compound is increased in a base
OH
each period has the same number of _______
orbital shells
a mixture where we CAN see the different particles is called __________.
a mixture where we CANNOT see the different particles is called __________.
heterogeneous
homogeneous
A ________ is formed when two or more atoms are joined together by a chemical bond.
molecule
Chewing food to break it down into smaller particles represents a _ change, but stomach acid digesting the chewed food is _change.
physical
chemical