atoms Flashcards
what is an atom
an atom is the smallest part of an Element that makes up everything
what is a molecule
a molecule is 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 an element
an element is a group of the same type of atom
what is a compound
a compound is two or more elements chemically bonded
what is a mixture
a mixture is two or more elements just mixed together and can be separated
what is a nucleus
a nucleus is the small dense region consisting of protons and neutrons at the center of an atom
what is a proton
a proton is a sub atomic particle with a positive charge
what is a neutron
a neutron is a subatomic partacle with a neutral charge
what is an electron
an electron is a subatomic partacle with a negative charge
what is an isotope
an isotope is two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclus
what is an atomicmass
an atomic mass is the number that eaquals the protons + the neutrons in the atom
what is an atomic number
an atomic number is the number of protons and electrons in the atom
