4.1 Elements and Symbols

• All the substances in our world are made up of 88 elements.

• Elements can't be broken down into simpler substances.
• The elements have been named for planets, mythological figures, colors, minerals, geographic locations, and famous people over the centuries.

• A complete list of elements and their symbols can be found on the inside front cover of the text.

• The first letter of an element's symbol is capitalized.

• We know when a different element is indicated with Silicon.

• The symbols of two elements are disliked by Neon.
• The element Co has a symbol.
• There are two elements in the capital letters CO, carbon and oxygen.

• The ancient Latin or Greek words that the symbols are derived from are given in parentheses.

• Most of the symbols use letters from the current names, but some are derived from ancient names.
• Learning their names and symbols will help you learn chemistry.

• Write the chemical symbols for the elements.

• Practice Problems 4.1 to 4.6 Mercury (Hg) is a silvery, shiny element that is a liquid in a room.
• Mercury can enter the body through inhaled mercury vapor, of mercury poisoning occurred contact with the skin, or ingestion of foods or water contaminated with in Minamata and Niigata, mercury.
• In 1965, mercury disrupted cell func Japan.
• Long-term exposure to mercury can damage the brain and kidneys, the ocean was polluted with cause mental retardation, and decrease physical development.
• Mercury can be found in blood, urine, and hair samples.

• Toxic mercury is converted into a major food in the diet in both freshwater and seawater.

• We are exposed to mercury by consuming mercury-contaminated fish.
• The Food and Drug Administration set ral damage when mercury levels in fish became a concern.
• In the United States, the maximum level of mercury in every kilogram of sea between 1988 and 1997 is a silvery one.

• When the use of mercury was banned, fish higher in the food chain, such as swordfish and shark, lost 75% of their mercury content.

• The EPA advises against consuming certain batteries and compact fluorescent light bulbs more than once a week.