The number of protons found in the nucleus of an atom Protons and electrons are usually the same...
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Transcript of The number of protons found in the nucleus of an atom Protons and electrons are usually the same...
• The number of protons found in the nucleus of an atom
• Protons and electrons are usually the same number unless they are isotopes.
• It determines what the element is.
• The element Uranium has a atomic number of 92.
• The average mass of a chemical element expressed in mass units
• Calculated by adding the number of protons and neutrons in the nucleus of an atom.
• The atomic mass of Uranium is, (92(e)+146(n)), 238 amu.
• The temperature at which a liquid boils at sea level.
• Expressed in Kelvin instead of Celsius
• Conversion of Celsius to Kelvin: ºC + 273
• The boiling point of Uranium is, (3818°C + 273), 4091 K.
• The temperature at which a solid becomes a liquid at 1 atm.
• Expressed in Kelvin instead of Celsius
• Conversion of Celsius to Kelvin: ºC + 273
• The melting point of Uranium is, ( 1132°C + 273), 1405 K.
• Defined as the measure of the amount of matter
• The symbol for density is (ρ), the Greek letter rho.
• The density of Uranium is 18.95 g/cm3.
• There are 3 types of matter:
1. Solid
2. Liquid
3. Gas
• Everything in the world either exists as a solid, liquid, or gas.
• Uranium is in the physical state of a solid.
• The electrons on the outermost shell of an atom
• Determines how the atom reacts with other atoms
• Uranium has 6 valence electrons on its outermost shell.
• The arrangement of electrons in an atom
• The format when writing an atom’s electron configuration consists of numbers, letters, and subscripts.
• For example: 1s2
1: orbital #
s: type of orbital
2: # of electrons in that orbital
• The electron configuration of Uranium is portrayed as: 1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d10f3 6s2p6d1 7s2
• There are 18 vertical groups on a periodic table.
• There also 7 horizontal periods on the periodic table of elements.
• Group of Uranium: 3
• Period of Uranium: 7
• an atom with the same atomic # but has a different # of neutrons
• Uranium has a total of 21 isotopes.
• The 3 main isotopes of U are:
U-234, U-235, and U- 238.
• Founded by Martin Klaproth
• 1789 in Germany
• Uranium got its name from the planet Uranus
• It is ranked as the 48th element to be most abundant in the world