Answer:
Kr, mass number 81, number protons 36.
Explanation:
If the atom has 36 electrons, and it is neutral, it has 36 protons. 36 protons means that this element has atomic number = 36. This is Kr.
Mass number = number protons + number neutrons = 36 + 45 = 81
The gain or loss of heat energy is what makes a reaction either endothermic or exothermic. A reaction is said to be endothermic if it absorb heat from the environment while a reaction is described as exothermic if it gives out heat to the environment. During chemical reaction, the bond energy of the reactants needs to be broken and new bond has to be formed in the products. The formation and breaking of bonds requires energy,
Algae is not an abiotic factor.
A) Hg, or Mercury, is a liquid at room temperature. Hope this helps!!
REACTION TYPE:
Single displacement/Oxidation-reduction
(Hope this helped UwU)
