CHEMICAL PRINCIPLES CHAPTER 2 COMPREHENSIVE SOLVED QUESTIONS AND COMPLETE ANSWERS

CHEMICAL PRINCIPLES CHAPTER 2
COMPREHENSIVE SOLVED QUESTIONS AND
COMPLETE ANSWERS

◉ Atomic number:.
Answer: number of protons
ie: what element you're looking at


◉ Atomic number =.
Answer: protons


◉ Atomic weight =.
Answer: protons + neutrons


◉ _____ represent potential energy.
Answer: electrons


◉ Stable atoms must have ____ electron shells.
Answer: full


◉ Inert elements have their outermost energy levels.

, Answer: fully occupied by electrons = fully stable element


◉ Reactive elements DO NOT have their outermost energy level.
Answer: fully occupied by electrons


◉ The number of missing or extra electrons in the outermost shell is
known as the ___..
Answer: valence


◉ molecules hold together because the valence electrons of the
combining atoms form attractive forces called _____ between the
atomic nuclei.
Answer: chemical bonds


◉ ____ is a molecule that contains 2 or more kinds of atoms.
Answer: compound


◉ The number or protons and electrons are ____ in an atom.
Answer: equal


◉ ____ are charged atoms that have gained or lost electrons.
Answer: Ions