Answer:
Option D would be correct: The mass of the products is equal to the mass of the reactants
Explanation:
For example, in chemical reactions, <u>the mass of the chemical components before the reaction is equal to the mass of the components after the reaction</u>.
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Signs that a chemical reaction is occurring are: 1. change in color 2. change in odor 3. change in pH, as in changes from acid to base or base to acid
Because the penny absorbs the kinetic energy from the impact and releases it back into the environment as heat since the energy cannot be stored as potential energy.
There's three types of decay: alpha beta and gamma.
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Alpha decay is the emission of a helium nucleus (2protons and 2 neutrons)
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Beta decay is the emission of an electron or a positron (
or
). It does affect the weight of the atom.
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Gamma decay is the emission of photons with a high energy. It does affect the weight of the atom.
To answer the question,
any nuclear reaction which decreases the atomic weight by 4 and the protons by 2 is an alpha decay. (release of an alpha or helium nucleus)