Vocabulary
only one kind of atom
What is an element?
examples
What are lemons and vinegar?
examples
baking soda or bleach
based on the number of protons in the nucleus
What is the atomic number?
chemical symbols and numbers abbreviating the name of a compound
What is the chemical formula?
the smallest piece of an element that can be recognized as that element
What is an atom?
taste
What is sour?
texture
What is slippery to the touch?
sum of the number of protons and neutrons
What is the atomic mass?
horizontal rows of the periodic table of elements
What are periods?
an atom that has gained or lost electrons
What is an ion?
texture
What is can burn, corrosive?
taste
What is bitter?
Scientist who invented the simplified model of the atom
Who is Niels Bohr?
when atoms share electrons
What is a covalent bond?
The process in which different types of atoms join and form a new substance
What is chemical change?
numbers on the pH scale
What are 0-6.9?
numbers on the pH scale
positively and negatively charged ions attract each other
What is an ionic bond?
vertical columns of the periodic table
What are groups?
an ionic compound produced from a reaction between an acid and a base
What is a salt?
a substance that changes color when exposed to an acid or base
What is an indicator?
determine the concentration of acids and bases
What is the pH scale?
compound is broken down into a simpler compound
What is a decomposition compound?
atoms bond together to complete their __________.
What is electron shell?