Unit 2 New and Improved Chem1040

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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.


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