Unit 2 New and Improved Chem1040
Anion
A negatively charged ion
Ion
An atom or group of atoms that has a positive or negative charge.
valence electrons
Electrons on the outermost energy level of an atom
octet rule
States that atoms lose, gain or share electrons in order to acquire a full set of eight valence electrons
valence shell
The outermost energy shell of an atom, containing the valence electrons involved in the chemical reactions of that atom.
electron cloud
a region around the nucleus of an atom where electrons are likely to be found
Ion formation
Atoms gain or lose electrons to become more stable
What is the correct IUPAC name for BrCl₃?
bromine trichloride
What is the correct IUPAC name for As₂S₅?
diarsenic pentasulfide
Isoelectronic
having the same number of electrons
cations
positively charged ions
Which of the following best describes what happens when an ionic bond forms?
two atoms, one atom which is more electronegative than the other, exchange electrons and the charges hold the atoms together.