The Atom
the central part of the atom; made up of protons and neutrons
nucleus
Toothpaste
Base
an atom that has gained or lost electrons
ion
Who created the periodic table?
Dmitri Mendeleev
The compound H2CO3 has how many atoms of oxygen in it?
3 atoms of Oxygen
the smallest piece of an element that can be recognized as that element
atom
Gastric juices
Acid
based on the number of protons in the nucleus
atomic number
"K" is the ______ ______ that represents potassium.
chemical symbol
Who developed the simplified model of the atom?
Niels Bohr
Electrons travel in the ______ ______ around the nucleus.
electron shell
Baking Soda
Base
chemical formula
In a ____ atoms share electrons.
covalent bond
What is the chemical formula for table salt?
NaCl
_____ have a positive charge while _____ have a negative charge
protons; electrons
You can determine the concentration of acids or bases in a solution by using...
the pH scale
process in which different types of atoms join and form a new substance
chemical change
The periods (horizontal rows) on the periodic table group elements together based on how many _________ ________ the element has.
electron shells
What range of numbers on the pH scale classify as an acid?
0-6.9
Adding together the protons and neutrons of an element equals the atomic ______ of an element.
mass
Water
Neutral
an ionic compound produced from a reaction between an acid and a base
salt
The rows (vertical columns) tell us what about an element?
(Use Textbook pg. 168-169) What is the atomic number for Terbium?
65