Matter and Atoms
A substance containing only one kind of atom.
What is an element?
These have a positive charge and help make up the nucleus of an atom.
What are protons?
The one or two-letter abbreviation for the name of an element.
What is a chemical symbol?
What is a stable atom?
Can burn or be corrosive and have a sour taste.
What is an acid?
The number of electrons in a normal atom is the same as the number of these.
What are protons?
These travel around the nucleus and have a negative charge.
What are electrons?
Vertical columns on the periodic table. Tells how many electrons are in the element's outer shell.
When molecules combine to form a new substance.
What is synthesis?
These are slippery to touch and have a bitter taste.
What is a base?
The smallest piece of an element that can be recognized as that element.
What is an atom?
This part of the nucleus has no charge.
What are neutrons?
The sum of the number of protons and neutrons in an atom (approximate).
What is atomic mass?
The process in which different types of atoms join to form a new substance known as a compound.
What is a chemical change or a chemical reaction?
This will help you determine the concentration of acids or bases in a solution.
What is the pH scale?
An atom that has gained or lost electrons.
What is an ion?
This is based on the number of protons in the nucleus of an atom.
What is the atomic number?
The horizontal rows on the periodic table. Tells how many shells of electrons the element has.
What are periods?
What is an ionic bond?
A substance that changes color when exposed to an acid or base solution.
What is an indicator?
The study of matter - what it is made of, what its usual characteristics are, how it reacts to other matter.
What is chemistry?
The center section of the atom, made up of protons and neutrons
What is the nucleus?
Chemical symbols and numbers abbreviating the name of a compound.
What is a chemical formula?
A reaction that occurs when a compound is broken down into simpler compounds.
What is decomposition?
An ionic compound produced from a reaction between an acid and a base.
What is salt?
This scientist developed a simplified model of an atom.
Who is Niels Bohr?
The cloud-like space around the nucleus where the electrons stay.
What is the shell?
This scientist developed the Periodic Table of the Elements.
Who is Dmitri Mendeleev?
This is formed when atoms share electrons.
What is a covalent bond?
The meaning of the letters pH.
What is potential hydrogen?