Atoms and Elements
What are Elements?
Elements are substances that can not be chemically broken down into simpler substances. There are more than 100 known elements. Most of the first 92 known elements are found in nature. The rest have been made in labs by scientists. Most elements are solid at room temperature. That means the particles are tightly packed together with barely any space between them.. Some examples are iron, zinc, lead, silver, and gold. Other elements like mercury and bromine are liquids at room temperature. Their particles are not as tightly packed together as the particles in a solid and have more space between them. . Still others like oxygen, hydrogen, helium and neon are gasses at room temperature. The particles in a gas are much are much more free and the spaces between them is huge.
All matter is made up of elements. Some matter is made of only one element. Have you ever seen a bar of gold . That would be an example of matter made of just one element -gold. We call that pure. Other matter is made of different elements that combine chemically. For example if oxygen and hydrogen is combined chemically we have water.
by Monica B.
Element Acrostics
Neon
This is the element that I did for my atom that I made in class. Neon comes in different colors and lights up. Every neon atom is a rare gaseous element present in the atmosphere to the extent of 1 part in 65,000 parts of air. Of all the rare gasses, the discharge of neon is the most intense at ordinary voltages and currents. Natural neon is a mixture of isotopes.
by Giordi R.
Silicon
Silicon is a very important element. I think silicon is very interesting because it is found in meteorites. Large quantities of silicon can cause a serious disease known as Silicosis, if it is inhaled. In 1859 Deville first prepared crystalline silicone, the second form of the element. Cement and solar cells used for lots of electronic devices contain silicon. On earth silicon is one of man's most useful element. Nobody knows what else silicon is capable of but we will find out.
By Jackson P.
Neon
Neon is a very interesting element in The Periodic Table. Even though neon has 10 protons and 10 electrons, it is also a mixture of isotopes. Obviously, Neon is very inert element. Neon is also used in high voltage indicators, lightning arrestors, wave meters and used to be used in TV tubes.
By Matthew A.
