A
A class of elements has a dull appearance, and is a poor conductor of heat and electricity
What are nonmetals?
A class of elements typically characterized by their shiny luster, excellent ability to conduct heat and electricity, malleability and ductility.
What are metals?
The number of protons in the nucleus of an atom.
What is atomic number?
Proton + Neutron
Positively charged particles located in the nucleus.
What is proton?
Elements that have the same number of protons (and atomic number), but a different number of neutrons.
What is isotope?
The weighted average mass of all the isotopes of an element.
What is atomic mass?
A written representation showing how electrons are arranged using the energy level, sublevel and the number of electrons
What is electron configuration?
A subdivision of an electron energy level within an atom represented by s, p, d or f
What is sublevel?
The area where electrons are found within the energy level.
What is orbital?