Answer:
c
Explanation:
esuba is activation energy
Radioactive decay is the loss of energy by unstable atomic nuclei. The reaction shows alpha decay. Thus, option d is correct.
<h3>What is alpha decay?</h3>
Alpha decay is a type of radioactive decay in which an alpha particle or the helium ion is released from the parent cell to produce the daughter nucleus.
The alpha decay in the isotope of the uranium to thorium and an alpha particle is shown as:
²³⁵U₉₂ → ²³¹Th₉₀ + ⁴He₂
In beta decay, a negatively charged electron is emitted along with the daughter nucleus and in gamma decay, gamma rays without charge and mass are emitted.
Therefore, the reaction shows option d. alpha decay.
Learn more about alpha decay here:
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Answer:
The answer is in the problem
Explanation:
As general rule of number of oxygen is -2:
O → -2
Alkali metals (Li, Na, K) are always +1
Na → +1
Alkali earth methals (Be, Mg, Ca...) are always +2
Ca → +2
The halogen group (F, Cl, Br...) is always -1
F → -1
The oxidation number of Si (+/- 4)
Aluminium is, usually +3
And to complete the octet rule in nitrogen, 3 electrons are required. That means:
N → -3
Answer:
C.
Explanation:
Specific heat capacity of a substance can be defined as the amount of heat a gram of the substance must lose or absorb in order to change its temperature by a degree Celsius. It is measured in Joules per kilogram per degree Celsius (J/kg°C).
Generally, the specific heat capacity of water is 4.182J/kg°C and is the highest among liquids.
Heat capacity or quantity of heat is given by the formula;
Where;
Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of the substance.
dt represents the change in temperature.
Hence in calculating the relationship between the amount of heat added to a substance and the corresponding temperature change, the specific heat capacity is usually represented by the symbol C.
Answer:
D- Kinetic Molecular Theory
Explanation:
. Gases consist of large numbers of tiny particles that are far apart relative to their size.
.Collision between gas particles and between particles and container walls are elastic collisions.
.Gas particles are in continuous motion. possess kinetic energy.
. Gas molecules have negligible intermolecular forces.
. Gas molecules have an average kinetic energy proportional to the ideal gas's absolute temperature.
