Atomic Theory
The tiny building block that makes up all matter.
What is an atom?
Substances that have a pH less than 7.
What are acids?
A reaction that releases heat to its surroundings.
What is an exothermic reaction?
The center of the atom that contains protons and neutrons.
What is the nucleus?
Substances that have a pH greater than 7.
What are bases?
A reaction that absorbs heat from its surroundings.
What is an endothermic reaction?
The negatively charged particle that moves around the nucleus.
What is an electron?
This scale is used to measure how acidic or basic a substance is.
What is the pH scale?
Feeling warmth during a reaction is a sign it is this type.
What is exothermic?
This particle has no charge and is found in the nucleus.
What is a neutron?
A substance with a pH of 7 is considered this.
What is neutral?
Feeling cold during a reaction is a sign it is this type.
What is endothermic?
The number of protons in an atom that identifies the element.
What is the atomic number?
This substance can change color to show whether something is an acid or a base.
What is an indicator?
An example of an exothermic reaction, such as burning wood.
What is combustion?