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                                                          matter   matter  =  matter  is anything that has mass, space and precieced by sense . ex = pen ,book iron etc    states of matter = water, liquid. gqs    

HYDROGEN : Hydrogen is the lightest and most abundant element in the universe. Here are some important notes on hydrogen: Chemical symbol and atomic number: Hydrogen is represented by the chemical symbol H and has an atomic number of 1. This means it has one proton in its nucleus and one electron in its electron cloud. Properties: Hydrogen is a colorless, odorless, and tasteless gas. It is highly flammable and can burn in the air or in the presence of oxygen to produce water vapor. Occurrence: Hydrogen is the most abundant element in the universe, making up about 75% of its elemental mass. It is found in stars, gas giant planets, and other celestial bodies. Isotopes: Hydrogen has three naturally occurring isotopes: protium, deuterium, and tritium. Protium is the most common, making up about 99.98% of all hydrogen atoms. Deuterium and tritium are heavier and are used in nuclear reactions. Uses: Hydrogen has a wide range of applications, including in the production of ammonia for fertili...