A combination of two or more metals is called and Alloy.
Number 1.- <span>A. Cells would not have any chemical reactions taking place.
Number 2.- </span><span>C.the energy required to start the reaction.
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Answer:
D. Invest
Explanation:
Only one that will reduce emissions
Vacuoles provide temporary storage of food, enzymes, and waste products in a cell.
-4
Explanation:
If a radioactive isotope undergoes alpha decay, it's mass number will change by -4.
The mass number of a nuclei is the sum of its number of protons and neutrons.
An alpha particle is similar of a helium atom:
⁴₂He
The atom above is made up of:
mass number = 4
Atomic number = 2
Number of protons = 2
Number of neutrons = 2
Number of electrons = 2
If a substance is undergoing radioactive decay, the mass number of the product will decrease by 4 and the atomic number will decrease by 2.
In nuclear equations, mass and atomic numbers are usually conserved.
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Transmutation brainly.com/question/3433940
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