Answer:
Here's what I get
Explanation:
i. E = mc²
E = energy
m = mass
c = the speed of light
"Energy equals mass times the square of the speed of light.”
The equation says that energy and mass are interchangeable. If you multiply the mass of an object by c², you get its equivalent and of energy.
The SI base units for energy are kg·m²s⁻².
The most common derived unit is the joule (J). Others are the newton-metre (N·m), kilowatt-hour (kWh), watt-second (W·s), and volt-coulomb (V·C).
ii. Nuclear vs chemical reactions
a. Alpha decay
[tex]\rm _{92}^{238}\text{U} \longrightarrow \, _{2}^{4}\text{He} + \, _{90}^{234}\text{Th}[/tex]
A nuclear reaction — like α decay — takes place in the nucleus of an atom.
An element becomes a different element.
b. Chemical reaction
Na· + ·Cl ⟶ Na⁺ + Cl⁻
A chemical reaction — like the formation of NaCl — involves rearranging the electrons, which are outside the nucleus.
The elements do not change.
Salt still consists of sodium and chlorine.
Answer:
In E = mc2
, E is the energy of the object , m is the mass, and cis the speed of light . the derived unit for energy is joules
A nuclear reaction like a decay takes place in the nucleus of an atom, and an element becomes another
element. A chemical reaction like the formation of NaCI involves rearranging the electrons, which are
outside of the nucleus, the elements do not change
Explanation:
