Science qz 335-342 Flashcards
describes electrons that are part of more than one chemical bond, being shared by more than two atoms
delocalized
the property of an element that describes how strongly atoms of that element pull on electrons in chemical bonds
electronegativity
a covalent bond in which both atoms share their electrons equally and the electrons are not pulled closer to one atom than to the other
nonpolar bond
a covalent bond in which the more electronegative atom pulls the shared electrons toward itself
polar bond
a charge less than that of a proton or electron
partial charge
a molecule that has opposite partial charges on opposite ends of the molecule
polar molecule
a substance consisting of atoms covalently bonded into a large structure that does not contain a specific number of atoms
covalent network
the simplest ratio of atoms in a covalent network
formula unit
the mass of a formula unit
formula mass
negative ion
anion
positive ion
cation
a bond formed by the attraction between the oppositely charged ions
ionic bond
-covalent bonding is associated with the term __1__
-ionic bonding is associated with __2__
- sharing electrons
- transferring electrons
an ion formed from a group of atoms
polyatomic ion
an orderly geometric arrangement consisting of millions or billions of ions all bonded by electrical attraction
ionic crystal
the bonding in metals in which valence electrons are shared by all the atoms in the metal
metallic bonding
______ follow these rules:
1. the name of the last element is changed to end in -ide
2. prefixes are added to each element indicating how many atoms are present
covalent bonds
_____ follow these rules:
1. list the names of the ions with the cation listed first
2. the charges of the ions in an ionic compound must add to zero
3. when an element can form more than one monatomic cation, the charge of the ion is included as a Roman numeral
ionic bonds
combinations of chemical symbols and numbers showing the type and number of atoms in each compound
chemical formulas
tells how many of each type of atom are in a molecule
molecular formula
shows the general arrangement of the atoms in a molecule
structural formula
shows only the simplest ratio of atoms in a compound
empirical formula
For a nonmolecular compound, the empirical formula is the same as the _________
formula unit
