Formulas
How many hydrogen atoms are in the formula 2C(H2O)3?
12
Outermost electrons in an atom. Also the outermost energy level.
Valence Electrons
An ionic bond occurs when electrons are (given or taken/shared).
Given or taken
Covalent bonds occur when electrons are (given or taken/shared).
Shared
What is the molecular weight of H2Cl4(NO2)3?
(1.008)2 + (35.45)4 + (14.01)3 + (16.00)6 =
2.016 + 141.8 +42.03 + 96 =
281.85 amu
This formula shows the shape of a molecule, noting covalent bonds.
Structural Formula
(Larger/Smaller) atoms have greater forces of attraction.
Smaller
An atom will generally give up electrons if it has ___ or fewer in it's valence shell.
Three
A molecule made of two of the same element.
Diatomic Molecule
What is the oxidation number of indium in the compound In2O3 ?
3+
C5H3O is what type of formula?
Molecular
Atoms always want to use the (least/most) amount of energy when bonding.
Least
An atom will usually take electrons if it has ____ or more in it's valence shell.
Five
Molecules with a balanced charge that is not equally distributed. They are asymmetrical.
Polar molecules
What is the name of CrO (it is an ionic bond).
Chromium(II) Oxide
The most simplified empirical formula for C32Na16O8 would be ________.
C4Na2O
Are ionic bonds neutral?
Yes
An atom with an oxidation number of +2 would (give/take) ___ electrons.
Give two.
Molecules with an equal charge distribution. These are symmetrical.
Non-polar Molecules
What is the formula of tricarbon hexahydride?
C3H6
Of the following four elements, which would be LEAST reactive?
Hydrogen, Cesium, Helium, Boron
Helium
(Covalent/Ionic) bonds form when a metal bonds with a non-metal.
Ionic
Are ions neutral?
No
When three pairs of electrons are shared in a compound, it is this kind of bond.
Triple Covalent Bond
What is a formula which also contains water molecules?
A hydrate