Answer:
Protons and Neutrons
Explanation:
Neutrons and protons constitute almost all of an atom's mass. The third type of stable particle is the electron. Electrons have a negative charge but are extremely small and have a mass only 1/1850 that of a proton or neutron. They are so small that for practical purposes they do not contribute to the mass of the atom.
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Alcoholic fermentation<span>, otherwise known as ethanol </span>fermentation<span>, is an anaerobic process that drives the release of cellular energy by converting biological fuels, such as sugars, into ethanol and carbon dioxide. The microorganisms that carry out alcoholic </span>fermentation<span> are unicellular eukaryotic fungi called </span>yeasts so this would be your answer.
Many heavy radioactive atoms release alpha particles which are identical to helium-4 atoms. It is expected that emission of alpha particle will decrease the number of electrons and the original atom obtains positive charge. However, emission of one alpha particle decreases the atomic number of the original atom by 2 and the mass number decreases by 4. This is because atomic number of helium atom is 2 and the mass number is 4. As a result a new atom is formed. This is the product of the radioactive reaction.
Answer:
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Answer:
True
Explanation:
Significant digits are numbers that helps to present the precision of measurements calculations.
Numbers that do not contribute to the precision of a reading should not be counted as significant.
There are rules of assigning significant numbers:
- Leading or trailing zeros are insignificant and should only be counted as a place holder.
- All non-zero digits are significant
- Zeroes between non-zero digits are significant.
- Leading zeros in a decimal are significant before the number.
- All the numbers in a scientific notation are significant.