Jack and Jill went up the hill

To fetch a pail of water.

Jack fell down and broke his crown

And Jill came tumbling after.

While a textbook would say:Two individuals of Homosapiens of Masses M1 and M2 ascended an irregular, diagonal path from point A to B, covering a vertical distance h.The purpose of their toils was to bring a vessel with a conical frustum geometry filled with Di-hydrogen monoxide.In the meanwhile the mass M1 was destabilized and its potential energy, which was accumulated as a result of vertical ascent, was quickly changed into Kinetic energy. The cranial part of body of M1 touched the surface of earth as a result the joint between parietal and frontal bones of cranium was traumatized and the bones were fractured.At the same time M2 came down exhibiting rotational-translational motion.

Each element has a name and a symbol. The symbol is usually the element's first one or two letters or from the element's original Greek or Latin name.

John Dalton's theory:

• Atoms make up all elements.
• All atoms of an element are identical.
• Atoms of different elements are different.
• Compounds consist of atoms different by elements.
• Atom aren't generated or destroyed by a chemical reaction, which only changes the way the atoms are bonded.

A compound's components are shown by a chemical formula, which shows the element types and amounts via symbols and subscripts.

IE: C6H12O6 is a monosaccharide/sugar molecule.

Isotopes are atoms of the same element but with different numbers of neutrons.

IE: Carbon-12, carbon-13, and carbon-14 are isotopes of carbon.

An isotope is written with ZAX, where Z represents atomic number and A represents atomic mass.

IE: sodium-23 is 1123Na.

(The subscript should be right below the superscript number, but WikiAnswers' typing system doesn't allow that.)

Most elements are metallic and appear on the left side of the zig-zag.

Nonmetals are on the right side of the table.

Metalloids have some metallic and some nonmetallic properties and appear between the metals and the nonmetals on the table.

Metals usually lose 1 or more electrons to form cations (positive ions).

Nonmetals tend to gain 1 or more electrons to form anions (negative ions), which change their names by combining their root name with -ide.

IE: A sodium cation and a chlorine anion form sodium chloride (known as salt), an ionic compound.

The ion that an atom can form can be predicted by its position on the periodic table.

Alkali metals and alkaline earth metals from 1+ and 2+ cations, respectively.

Halogens and Group 6 atoms form 1- and 2- anions, respectively.

An ionic compound is electrically neutral, so the sum of its ions' charges always equal 0.

IE: sodium sulfide (Na2S) always has 2 sodium cations for every sulfur anion.