a chemical process in which two or more substances act mutually on each other and are changed into different substances, or one substance changes into two or more other substances.
What is a reaction?
100
a chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus red; typically, a corrosive or sour-tasting liquid of this kind. the opposite of a base
What is an acid?
100
each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter.
What is an element?
200
the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
What is a nucleus?
200
any change that results in the formation of new chemical substances.
What is chemical change?
200
solutions with a pH greater than seven , and there is a range of how basic a solution can be. the opposite of an acid
What is a base?
200
Any rearrangement of electrons in two atoms that generates a force, causing the atoms to be bound to each other, forming a molecule.
What is a bond?
300
a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
What is a proton?
300
a usually reversible change in the physical properties of a substance, as size
What is physical change?
300
A measure of acidity or alkalinity of water soluble substances
What is the pH scale?
400
a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
What is a neutron?
400
The changing of one chemical element into another.
What is transmutation?
400
which is a conserved property of certain subatomic particles that determines their electromagnetic interaction.
What is charge?
500
a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
What is a molecule?
500
a substance formed when two or more chemical elements are chemically bonded together.
What is a compound?
500
The mass of substance containing the same number of fundamental units as there are atoms in exactly 12.000 g of 12C.