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11.07.2019 •
Chemistry
Calculate the mass, in grams, of a single tellurium atom (mte = 127.60 amu ).
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Ответ:
The mass, in grams, of a single tellurium atom = 2,118. 10⁻²² grams
Further explanationInside the atom consists of a nucleus containing 3 elementary particles, namely protons and neutrons, while electrons move around the nucleus.
Protons are positively charged (+1), electrons are negatively charged (-1). and neutrons are uncharged (neutral)
While the mass of 1 proton is equal to the mass of 1 neutron, equal to 1 amu and the electron has a mass smaller than both.
Atomic mass is the average atomic mass of all its isotopes
In determining the mass of an atom, as a standard is the mass of 1 carbon-12 atom whose mass is 12 amu
So the atomic mass obtained is the mass of the atom relative to the 12th carbon atom
An atomic mass unit = amu is a relative atomic mass of 1/12 the mass of an atom of carbon-12.
The 'amu' unit has now been replaced with a unit of 'u' only
The hydrogen atom is the lightest atom whose mass is 1.67 x 10⁻²⁷kg (measured using a mass spectrometer) and simplified to 1 amu (atomic mass unit).
1 amu = 1,66.10⁻²⁴ grams
For example the C-12 carbon atomic mass is 12 amu, C-13 is 13 amu
Single tellurium atoms have = 127.60 amu
So that the mass is in grams:
mass = 127.60 amu x 1.66.10⁻²⁴
mass = 2,118. 10⁻²² grams
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Keywords: atomic mass, amu
Ответ:
tundra
Explanation:
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