Atoms and elements Flashcards
What is a proton?
Positively charged particle in the nucleus of an Atom
What is the nucleus?
The region in the center of an atom where most of the atoms mass and positive charge is held
What is a neutron?
A neutral particle in the nucleus of an atom
What is an electron?
A negatively charged particles that occupies the space in the atom outside the nucleus
What is the Electron cloud?
The region surrounding atoms nucleus where one or more electron are most likely to be found
What is the average atomic mass?
The average mass of the elements isotope waited accordingly to the balance of the isotope
What is the isotope?
Items of the same element that have different numbers of neutrons
What is the mass number?
number of protons and neutrons in an atom
What is the atomic number?
The number of protons in an atom of an element
What makes an element radioactive?
If the element emits radiation
What is nuclear decay?
The process that occurs when an unstable atomic nucleus changes into another stable radiation nucleus
What is ion?
Atom that is no longer neutral because it has lost or gained electrons
Definition of Luster
The way material reflects or absorbs light at it’s surface
What is ductility
The ability of a substance to be poured into thin wires
Malleability?
The ability of a substance to be hammered or rolled into sheets
