Answer: B. ΔH < 0, ΔS > 0, and ΔG < 0
Explanation:
Exothermic reactions are those in which heat is released by the system and endothermic reactions are those in which heat is absorbed by the system.
for Exothermic reaction is negative and for Endothermic reaction is positive.
Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.
is positive when randomness increases and is negative when randomness decreases.
When NaOH is dissolved into water, the molecules change their state from solid to aqueous and thus randomness increases. The beaker becomes warm means the reaction is exothermic
is positive and is negative Using Gibbs Helmholtz equation:
Thus 
will be negative.
Thus is positive, is negative and will be negative.
“<u>Aluminum</u>” and “<u>Nitrogen</u>” form an ionic bond.
Option: D
<u>Explanation</u>:
Aluminum and nitrogen are most likely to form an “ionic bond” among given pairs of elements in form of aluminum nitride. AlN is partially covalent and also show ionic characteristics as N needs 3 electrons to fill outer shell and Al has 3 electrons in valence shell. Hence 
is cation and 
is anion and have “electrostatic force” of attraction between these oppositely charged ions. Here ionic behavior is seen as nitrogen is more “electronegative” hence attract the shared pair of electrons which is earlier responsible for partial covalent bond formation.
I think the correct answer is electrons. All chemical reactions are dependent on the transfer of electrons. Other subatomic particles are located in the innermost portion of an atom and are bonded strongly with each other.
Answer:
Explanation:
uestion
If an atom of an element has a mass number of 45 and it has 20 neutrons in its nucleus, what is the atomic number of the
element?
