<span>They want a full outer shell of electrons, so the lose, gain, or share electrons with other elements, forming compounds, until they have 8 valence electrons and become stable.
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Valence electrons are the electrons in the outermost shell of an element on the periodic table. Atoms want to be able to have a full outer shell and they can share or trade electrons in order to achieve this. Valence electrons are also super super important in chemical reactions. The number of valence electrons determines what group that specific atom or element is in on the periodic table. This affects the reactivity of the element.
Answer:
1.196 M NaOH
Explanation:
Molarity = moles/Volume (L)
moles NaOH = mass NaOH/MM NaOH = 12/40.01 = 0.299 moles NaOH
Volume solution = 250 mL = 0.250L
M = 0.299/0.250=1.196 M NaOH
Answer:
The maximum wavelength of light for which a carbon-carbon triple bond could be broken by absorbing a single photon is 143 nm.
Explanation:
It takes 839 kJ/mol to break a carbon-carbon triple bond.
Energy required to break 1 mole of carbon-carbon triple bond = E = 839 kJ
E = 839 kJ/mol = 839,000 J/mol
Energy required to break 1 carbon-carbon triple bond = E'
The energy require to single carbon-carbon triple bond will corresponds to wavelength which is required to break the bond.
(Using planks equation)
The maximum wavelength of light for which a carbon-carbon triple bond could be broken by absorbing a single photon is 143 nm.
Moller discovered the decarboxylase broth to distinguish the gram-negative enteric bacilli based on the tendency of these bacteria to decarboxylate the amino acids. The decarboxylase broth will determine the existence of ornithine decarboxylase, lysine, and arginine dihydrolase.
The medium comprises beef extract, peptic digest that functions as a source of nitrogen, dextrose that is the fermentable carbohydrates, and pyridoxal that functions as a cofactor for decarboxylase enzyme. The decarboxylase enzyme is generated only under acidic conditions.
A different base broth is not needed for each decarboxylase medium as when the medium is inoculated with the dextrose fermenting bacteria, the bacteria will generate acid, which reduces the pH of the medium. This variation in pH will modify the color of the medium from purple to yellow. This change in color will assist in determining that whether decarboxylation took place or not.
