Symbol: C; atomic no: 6; atomic wt: 12.011; valency: 2, 3, or 4; relative density: 1.8–2.1 (amorphous), 1.9–2.3 (graphite), 3.15–3.53 (diamond); sublimes at 3367±25°C; boiling pt: 4827°C 1. Symbol C A naturally abundant, nonmetallic element that occurs in all organic compounds and can be found in all living things. Proteins, sugars, fats, and even DNA all contain many carbon atoms.
a nonmetallic element found combined with other elements in all organic matter and in a pure state as diamond and graphite. Diamonds and graphite are pure forms, and carbon is a major part of coal, petroleum, and natural gas. The element carbon is also important, however, outside the chemistry of living things.
But in graphite, each carbon atom bonds only to three others in a much looser arrangement of layers, each of which is weakly bonded to neighboring layers.
Because individual layers of carbon in graphite are so loosely connected, they are easily scraped away, which is why it is used as pencil "lead" for writing.
First, we need to understand a few terms concerning the atom.
) carbon atoms would fit inside the period at the end of this sentence. If an atom were the size of a football field, its nucleus—which contains about 99.98% of an atom’s mass—would be the size of a tiny seed ! An electron is to a speck of dust as a speck of dust is to the earth!
The Table of Radionuclides documents the naturally-occurring radioisotopes.
Some isotopes decay and immediately produce a stable daughter product.
The sum of the number of neutrons and protons in an atom's nucleaus defines its approximate atomic weight.Few of the theorized steps can be demonstrated experimentally.Observations on earth and in space support the hydroplate explanation and refute the evolution explanation for earth’s radioactivity.To contrast and evaluate two radically different explanations for the origin of earth’s radioactivity, we will first explain some terms.With that background, new and surprising experimental evidence will become clear.
When an isotope emits an alpha particle, the resultant daughter product has an atomic number two units less than its parent's atomic number, and an atomic weight four units less than its parent's atomic weight.