Magesium - The metal that is the central atom in the pyrrole rings of the molecule chlorophyll, Mercury - Liquid metal, Hydrogen and Helium - 95 % of the Sun's mass is made up of these two elements., Ammonia - The formula for this molecule is NH3. The compound is used in fertilizer. Nitrogen and hydrogen gases combine to create the compound, in a process developed by Fritz Haber , Niobium and Chromium - Both of these elements are exceptions of the Aufbau principle ( which gives the order in which subshells fill), Nitrous oxide - Laughing gas, N2O, This gas is a propellant for whipped cream. This gas can be injected into engines of race cars to allow more fuel to be burned. This gas is triatomic and used in dentistry., Potassium, K - Inadequate amount of this element in the body is called hypokalemia. Two ions of this element are exchanged for three ions of sodium in a biological pump in animal cell. The atomic number of this element is 19., Oxygen - An MRI scan uses relative concentrations of this molecule to determine brain activity. This molecule is displaced from an iron atom by a triply-bonded diatomic gas in carbon monoxide poisoning. Hemoglobin transports what gas produced by plants that humans breathe in. Atomic number 8., Free Radicals - Highly reactive chemical species that contains unpaired electrons., Electronegativity - Measures an element's tendency to attract electrons, Fluorine - Has the largest electronegativity on the periodic table using the Pauling scale., Aluminium - complexs of this metal are found in the most common active ingredient in antiperspirants. This element is purified from its primary ore, bauxite through electrolysis in the Hall-Heroult process. This metal is used in most soda cans and namesake foil?, Water - This molecule is lost through exudation during guttation. In the cohesion-tension theory, this molecul is transported by capillary action through the xylem. Carbon dioxide reacts with this molecule to form sugars in photosynthesis. It's formula is H2O., Adiabatic - In thermodynamics, this term refers to any process in which there is no net heat transfer between a system and its surroundings., Tin - Slow-forming "whiskers" of this metal can accidentally connect components of a circuit board, causing a short circuit. 1831 Britain's Royal Navy began storing and transporting rations using cans made of this element. Elemental symbol is Sn., Bronze  - Alloy between copper and tin., Sulfuric acid - first produced industrially in lead chambers, today is produced by contact process. Found in the clouds of Venus, and in lead- acid batteries. Formula H2SO4,

Elements, Compounds, Chemistry

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