- Find the number of moles of sodium (Na) in 145 g of sodium. How many moles is 0.55 g of magnesium (Mg)? If you have 7.22 x 1023 atoms of chromium (Cr), how many moles of chromium do you have? What mass of tungsten (W) is 35 moles of tungsten? How many atoms is 5.2 moles of titanium (Ti)?
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- Atomic number of sodium is 11 and the atomic mass number of sodium is 23. The difference in atomic mass number and atomic number signifies, number of neutrons. In present case, number of neutrons = 23 - 11 = 12. Answer 3: Atomic number of sodium is 11. Atomic number signifies, number of electrons or protons present in the system.
Atomic mass of Sodium is 22.9897 u.
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Na Mass Number
Sodium Neutron
Melting Point Of Sodium
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