In a _______reaction, a compound is broken down into smaller compounds
decomposition
Acid or Base: Baking soda, soap, bleach
Base
The smallest piece of an element that can be recognize as that element
Atom
What is based on the number of protons in the nucleus?
The Atomic Number
When positively and negatively charged ions attract each other they form a/an...
Ionic bond
A substance, only one kind of atom
element
Acid or Base: Lemons, vinegar, tomato juice
Acid
A substance that changes color when exposed to an acid or base solution is ....
an indicator
Acid or Base: Sour Taste
Acid
The compound H2CO3 has ____atoms of oxygen in it.
Three
The process in which different types of atoms join and form a new substance
Chemical Change
The study of matter, what is made of, what its usual characteristics are, how it reacts with other matter
Chemistry
Chemical symbols and numbers abbreviating the name of a compound
Chemical Formula
A atom that has gained or lost electrons
ion
An ionic compound produced from a reaction between an acid and a base
Salt
Why are all compounds molecules but not all molecules are compounds?
Some molecules form when two atoms of the same element combine. Others (Compounds) when two atoms of different elements combine through a chemical reaction.
The sum of the number of protons and neutrons results in the atom's approximate...
Atomic mass
Acid or Base: Can burn and be corrosive
Acid
You can determine the concentration of acids and bases in a solution by using _____
the pH scale
If oxygen has 8 protons, how many electrons does it have?
8 electrons
Who developed a simplified model of an atom?
Niels Bohr
Who developed the periodic table of elements?
Dmitri Mendeleev
Your experience on this site will be improved by allowing cookies.