Chemistry

What is Chemistry?

The science that deals with the structure and properties of substances and with the changes that they go through
Vocabulary

chemistry
a science that deals with the structure and properties of substances and with the changes that they go through
element
a basic substance that is made of atoms of only one kind and that cannot be separated by ordinary chemical means into simpler substances
proton
a very small particle of matter that is part of the nucleus of an atom and that has a positive electrical charge
neutron
a very small particle of matter that has no electrical charge and is part of the nucleus of all atoms except hydrogen atoms
electron
a very small particle of matter that has a negative charge of electricity and that travels around the nucleus of an atom
Nucleus
the central part of an atom that is made up of protons and neutrons
atomic number
the number of protons in the nucleus of an atom
atomic weight
the weight of an atom is the sum of its protons and neutrons