Answer: The atomic number indicates the number of protons within the core of an atom. The atomic number is an important concept of chemistry and quantum mechanics. An element and its place within the periodic table are derived from this concept. ... These electrons mainly determine the chemical behaviour of an atom. The chemical properties of an element, are determined by the number of protons in the nucleus. This number of protons is called the atomic number. The mass of the atom, its atomic mass, depends upon the sum of the number of protons and the number of neutrons present in the nucleus.
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CO₂ does not have dipole-dipole forces as its strongest force.
Draw the 3D structures of each molecule. All have C-O, C-Br, or C-Cl <em>bond dipoles</em>.
In CO₂ the C-O bond dipoles point in opposite directions, so they cancel.
CO₂ has <em>no molecular dipole</em>. Its strongest intermolecular forces are <em>London dispersion forces</em>.
In all the other molecules, the C-Br, C-Cl, and C-O bond dipoles do not cancel. These molecules all have intermolecular dipole-dipole forces.
You should know the implicit meaning of the prefixes of units of measurements. Let's take for example, the unit of meters. When you say kilometers, that would be 10³ of a meter. When you say megameters, that's 10¹⁰ of a meter. So, if a unit is 5.69×10¹⁰ meters, you can just express that into 5.69 megameters.
Answer:
Approximately .
Explanation:
If the concentration of ions in a solution is , the of that solution would be .
Note that the base of the logarithm in this calculation should . One way to be sure is to state the base explicitly. Using the change of base rule of logarithms:
.
In this question, it is implied that the concentration of in the given solution is , such that . Using the equations above:
.
I believe it’s B nonnative species introduction