Science online learning
A harmful compound that is formed when two or more harmless elements react together
Compound: Nitric acid
Formula: HNO3
Elements: Hydrogen, Nitrogen, Oxygen
Bond: Covalent
Write up: Nitric acid is a compound formed chemically, which is made up of the elements, oxygen, hydrogen, and nitrogen. Nitric Acid is highly toxic, highly toxic, and reacts with most metals. Pure anhydrous nitric acid (100%) is a colourless mobile liquid with a density of 1.522 g/cm3 which solidifies at −42 °C to form white crystals and boils at 83 °C. When boiling in light, and slowly even at room temperature, there is a partial decomposition. It reacts with most metals except for some, like gold, and also many organic materials, it can be explosive. Nitric acid is also commonly used as strong oxidizing agent.
Nitrogen: odorless, tasteless and colourless. Nitrogen can be used as a fertilizer. Nitrogen has the chemical symbol N and atomic number 7 in the periodic table. It forms 78.08% by volume of Earth's atmosphere. Nitrogen has extremely strong chemical bonds, but when the bonds are broken from compounds, due to burning, decay, nitrogen gas is released into the atmosphere. A nitrogen atom has five valence electrons.
Oxygen: odorless, tasteless and colourless. Oxygen is needed for respiration and burning. It has the chemical symbol O and atomic number 8. Oxygen makes up 20.8% of the world’s atmosphere. Another form (allotrope) of oxygen, ozone (O3), helps protect the biosphere from ultraviolet radiation with the high-altitude ozone layer
Hydrogen: The lightest and most abundant element, it is highly flammable. It constituting roughly 75 % of the Universe's chemical elemental mass. Hydrogen forms compounds with most elements and is present in water and most organic compounds. It plays a particularly important role in acid-base chemistry with many reactions exchanging protons between soluble molecules. It is the simplest of elements and produces water when hydrogen gas is burned. Hydrogen is colorless, odorless, non-metallic, and tasteless.
Dot and Cross diagram
Sources: http://en.wikipedia.org/wiki/Hydrogen
http://en.wikipedia.org/wiki/Oxygen
http://en.wikipedia.org/wiki/Nitrogen
http://en.wikipedia.org/wiki/Nitric_acid
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