Answer: Thus X is Plutonium
Explanation:
Alpha Decay: In this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. The mass number is reduced by 4 units and atomic number is reduced by 2 units.
General representation of alpha decay :

where Z = atomic number
A= mass number
X and Y = atomic symbol of elements

Thus 
Thus X is Plutonium with atomic number 94 and mass number 239
Answer:
conditioning
trial-and-error learning
insight learning
imprinting
the process of associating a stimulus with a good or bad outcome
the process of using prior knowledge to solve a problem
a bond to a individual or object shortly after birth or hatching
the process of performing a behavior more and more skillf
Explanation:
The answer is True. Transportation is used by cars, airplanes, trains, and many other things.
Answer:
The component that dissolves the other component is called the solvent. Solute – The component that is dissolved in the solvent is called solute
<u>1) find molar mass of CH₄</u>

<u>2) determine moles of CH₄</u>

<u>3) multiply by avogadro's number</u>
