Subatomic Particles and the periodic table 1. The three particles and their properties An atom has no overall charge. The protons (positively charged) and neutrons (no charge) make up the nucleus of an atom, and this is surrounded by negatively charged electrons. There are as many protons as electrons, so they balance each other out, creating a neutral relative charge on the atom. Neutrons, Protons and electrons are all sub-atomic particles.
The strong radiation from the atomic bomb contaminates the city. This radiation kills all of the people there. The explosion from the bomb whirls up massive amounts of dust and water. The dust and water become radioactively contaminated and fly several feet up. Then, the day after the nuclear explosion, the contaminated dust and water rain down and contaminate a large area.
Chemistry chapter 6.3 1) a. Cation b. Electrostatic forces 2) Ionic bond between metal and oxygen, the metals conduct electricity in a solid state using delocalised electrons. They are coated with a special kind of plastic e.g. Copper. 3) When they contain 8 valance electrons. 4) When naming an ionic compound, which ion is given first?
Fluorine is a corrosive pale yellow gas. It is highly reactive, participating in reactions with virtually all-organic and inorganic substances. Fluorine is the most electronegative element. Metals, glass, ceramics, carbon, and water will burn with a bright flame in fluorine. It is possible that fluorine can substitute for hydrogen in organic reactions.
Too gross. Tongs! That’d work. Not only could I avoid skewering the dead mouse, there’d be a ten-inch buffer of steel between us. I lifted the tongs from the hook and squeezed the spring-loaded handle.
Year 12 HSC Chemistry Notes (Conquering Chemistry) Module 1 – production of Materials Ethylene, polymers and ethanol * Fossil fuels – energy rich substances formed in the Earth’s crust under intense heat and pressure millions of years ago. Originally remains of marine organisms, they were converted into petroleum that is trapped near the Earth’s surface. Fossil fuels can be extracted and refined to provide energy, and the building blocks of crude oil can be used to create numerous materials for human use e.g. ethylene. * Petroleum – mixture of hydrocarbons, consists of liquid crude oil and gaseous natural petroleum gas.
Once this is completed, a perforating gun is lowered into the well. When fired, the gun will create cracks in the rock (Fischetti , 2010). The gun is then removed and a mixture of water, sand and chemicals is pumped into the well under pressure. The intense pressure forces thousands of cracks to open up in the gas laden rock formations. The natural pressure existing in the well forces the water and chemicals back up the well.
------------------------------------------------- The person who discovered helium is named Pierre Janssen, and he discovered helium in 1868. He discovered it while looking at the Sun. ------------------------------------------------- The atomic number is two and the atomic mass is 4.003. ------------------------------------------------- This element is not commonly found in nature. It is found in natural gas wells.
The composition is nitrogen and oxygen. You can only see Pluto with a telescope. Its surface is dark brown and a little yellow. The Hubble space telescope barely showed any definition of the surface, because Pluto is so small and far. Pluto can only be seen by the light derived from its largest moon,
Most Methanogens are rapidly killed by the presence of oxygen. Mehtanogens are considered as extremophiles and are considered chemoautotrophs (they derive energy from inorganic compounds) and also all Methanogens and Archaea reproduce asexually. Methanogen activity created most of the earth’s natural gas deposits. Ecologically, Methanogens play the vital role in anaerobic environments of removing excess