Reactivity - Reactivity refers to how likely or vigorously an atom is to react with other substances. This is usually determined by how easily electrons can be removed (ionization energy) and how badly they want to take other atom's electrons (electronegativity) because it is the transfer/interaction of electrons that is the basis of chemical reactions.
Metals
Period - reactivity decreases as you go from left to right across a period.
Group - reactivity increases as you go down a group
Why? The farther to the left and down the periodic chart you go, the easier it is for electrons to be given or taken away, resulting in higher reactivity.
Non-metals
Period - reactivity increases as you go from the left to the right across a period.
Group - reactivity decreases as you go down the group.
Why? The farther right and up you go on the periodic table, the higher the electronegativity, resulting in a more vigorous exchange of electron
B.should be *columnar, but C.Circular is the answer
Answer:
Hot to cold
Explanation:
Unless people interfere, thermal energy or heat naturally flows in on direction only: hot towards cold. Heat moves naturally by any of three means. The processes are known as conduction, convection, radiation. Sometimes more than one may occur at the same time.
If its a acid it will be 3 or if its a alkali then 14 or neutral then 7
Answer:
10.86
Explanation:
Given that:
Concentration = 0.0288 M
Consider the ICE take for the dissociation of ammonia as:
NH₃ + H₂O ⇄ NH₄⁺ + OH⁻
At t=0 0.0288 - -
At t =equilibrium (0.0288-x) x x
The expression for dissociation constant of ammonia is:
![K_{b}=\frac {\left [ NH_4^{+} \right ]\left [ {OH}^- \right ]}{[NH_3]}](https://tex.z-dn.net/?f=K_%7Bb%7D%3D%5Cfrac%20%7B%5Cleft%20%5B%20NH_4%5E%7B%2B%7D%20%5Cright%20%5D%5Cleft%20%5B%20%7BOH%7D%5E-%20%5Cright%20%5D%7D%7B%5BNH_3%5D%7D)
x is very small, so (0.0288 - x) ≅ 0.0288
Solving for x, we get:
x = 7.2×10⁻⁴ M
pOH = -log[OH⁻] = -log(7.2×10⁻⁴) = 3.14
Also,
pH + pOH = 14
So, pH = 10.86
