Describing Chemical Formulas (2.4.1) Flashcards
• Atoms, molecules, ions, ionic compounds, and covalent solids are all different units of matter.
• Atoms, molecules, ions, ionic compounds, and covalent solids are all different units of matter.
• Chemical formulas are a “chemical shorthand” to quickly and accurately identify compounds.
• Chemical formulas are a “chemical shorthand” to quickly and accurately identify compounds.
• Chemical formulas can be represented graphically in many different ways.
• Chemical formulas can be represented graphically in many different ways.
Atoms are the smallest units of an element.
Molecules are well-defined groups of atoms that are
chemically bonded together.
Ions are charged particles that are obtained from
atoms by adding or removing electrons.
Ionic compounds and covalent solids are three dimensional repeating structures. Ionic compounds
are composed of positive ions (cations) and negative ions (anions) in a set ratio. Covalent solids are composed of covalently bonded atoms in a fixed ratio.
Atoms are the smallest units of an element.
Molecules are well-defined groups of atoms that are
chemically bonded together.
Ions are charged particles that are obtained from
atoms by adding or removing electrons.
Ionic compounds and covalent solids are three dimensional repeating structures. Ionic compounds
are composed of positive ions (cations) and negative ions (anions) in a set ratio. Covalent solids are composed of covalently bonded atoms in a fixed ratio.
Chemical formulas are a “chemical shorthand” to
quickly and accurately identify compounds.
Molecular formulas represent the actual number of
atoms of each element in a molecule. For example,
the molecular formula for benzene is C6H6.
Empirical formulas represent the simplest integer
ratio of the elements in a compound. For example,
the empirical formula for benzene is CH. The
empirical formula does not always uniquely identify
a molecule—CH could be benzene (C6H6), but it
could also be ethyne (C2H2).
Chemical formulas are a “chemical shorthand” to
quickly and accurately identify compounds.
Molecular formulas represent the actual number of
atoms of each element in a molecule. For example,
the molecular formula for benzene is C6H6.
Empirical formulas represent the simplest integer
ratio of the elements in a compound. For example,
the empirical formula for benzene is CH. The
empirical formula does not always uniquely identify
a molecule—CH could be benzene (C6H6), but it
could also be ethyne (C2H2).
Chemical formulas can be represented graphically
in many different ways.
A line drawing allows chemists to see how the
individual atoms connect together.
A shorthand is used by organic chemists to quickly
write common molecules.
A ball and stick representation closely resembles
the actual geometry of a molecule.
A space filling representation shows what a
molecule would look like magnified.
Chemical formulas can be represented graphically
in many different ways.
A line drawing allows chemists to see how the
individual atoms connect together.
A shorthand is used by organic chemists to quickly
write common molecules.
A ball and stick representation closely resembles
the actual geometry of a molecule.
A space filling representation shows what a
molecule would look like magnified.
What is a Lattice?
A Lattice is a tight and uniform configuration. Lattices are ionic salts or covalent solids.
What is a Cation?
A positively charged ion.
What is an Anion?
A negatively charged ion.
What is an Ionic Compound?
A compound composed of anions and cations.
Molecular Formula
The chemical formula that reflects the exact atomic composition of a molecule.
Empirical Formula
The chemical formula of a compound written with the smallest integer ratio of subscripts.
Molecules
Discrete packages of atoms connected together in well-defined numbers and ratios with no overall charge.
Isomers
Compounds with the same molecular formula but with different atomic structures.
