Explanation:
The representative elements are in columns A1 - A7. In an 18 column table the map is as follows:
A1 = column 1, hydrogen + alkali metals have 1 valence
A2 = column 2, alkaline earth metals have 2 valence
A3 = column 13, Boron family have 3 valence
A4 = column 14, Carbon group have 4 valence
A5 = column 15, Nitrogen family have 5 valence
A6 = column 16, Oxygen column - chalcogens have 6 valence
A7 = column 17, Fluorine column - halogens have 7 valence
<u>The group number of the representative elements = the number of valence electrons.</u>
Answer:
a) a space in an atom where an electron is most likely to be found
Explanation:
Atomic orbital is the mathematical function which describes wave-like behavior of the electrons present in the atom.
It is used to calculate probability of finding the electron of the atom in any region around nucleus of the atom. Atomic orbital is the physical region or a three dimensional space where the probability of finding the electron is more than 90% which also means that the space where an electron is most likely to be found. They are boundless space and have definite energy.
Option A best describes atomic orbital.
Answer:
At higher temperatures, particles move faster and collide more, increasing solubility rates.
Agitation increases solubility rates as well, by bringing fresh solvent into contact with the undissolved solute
The smaller the particle size, the higher (faster) solubility rate. Vice versa, the bigger the particle size, the lower (slower) solubility rate.
Explanation:
Answer:
A. Convex lens.
Explanation:
A convex lens causes light rays to meet at a focal point unlike concave, which lights rays spread out.
Answer:
49.2 g/mol
Explanation:
Let's first take account of what we have and convert them into the correct units.
Volume= 236 mL x (
) = .236 L
Pressure= 740 mm Hg x (
)= 0.97 atm
Temperature= 22C + 273= 295 K
mass= 0.443 g
Molar mass is in grams per mole, or MM= 
or MM= 
. They're all the same.
We have mass (0.443 g) we just need moles. We can find moles with the ideal gas constant PV=nRT. We want to solve for n, so we'll rearrange it to be
n=
, where R (constant)= 0.082 L atm mol-1 K-1
Let's plug in what we know.
n=
n= 0.009 mol
Let's look back at MM= and plug in what we know.
MM= 
MM= 49.2 g/mol
