Name that term
a substance; only one kind of atom
element
the smallest piece of an element that can be recognized as that element
19 electrons. In a normal atom there are the same number or electrons as protons.
lemons, vinegar, tomato juice
acid
Name the four parts of an atom
electron, proton, neutron, nucleus
an ionic compound produced from a reaction between an acid and a base
salt
the process in which different types of atoms join and form a new substance
What are two things you can tell about an element based on its location on the periodic table? (Hint: use the words periods and groups)
Periods (horizontal rows) tell how many shells of electrons and element has, and groups (vertical columns) tell how many electrons are in the element's outer shell. Elements in the same group have similar physical and chemical properties.
slippery to touch
Base
Who developed a simplified model of an atom?
Niels Bohr
based on the number of protons in the nucleus
atomic number
Chemical formula
chemical symbols and numbers abbreviating the name of a compound
You just got stung by a bee. You know that the bee sting is painful because of the acid that it contains. What is something you can use from your kitchen or bathroom that would help relieve the pain? Why would it work?
Base neutralizes an acid.
baking soda, soap, bleach
base
You can determine the concentration of acids or bases in a solution by using ___________.
the PH scale
an atom that has gained or lost electrons
ion
A decomposition reaction
occurs when a compound is broken down into simpler compounds
Who was the scientist that developed the periodic table of elements?
Dmitri Mendeleev
can burn; can be corrosive
acid
When positively and negatively charged ions attract each other they form what kind of bond?
ionic bond
the study of matter- what it is made of, what its usual characteristics are, how it reacts to other matter
chemistry
an indicator
a substance that changes color when exposed to acid or base solutions
The compound H2CO3 has how many atoms of carbon in it?
one
sour taste= ?
bitter taste=?
acid
base
In a (an) _____ bond atoms share electrons.
covalent