Answer:Scientists have identified more than 260,000 kinds of plants. They classify plants according to whether they have body parts such as seeds, tubes, roots, stems, and leaves. The three main groups of plants are seed plants, ferns, and mosses.
Explanation:
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Answer:
0
Explanation:
There are no unpaired electrons in the given element. It must be noted that for the atom above, we have even numbered electrons. The total electron we are having here is 18.
Now, we must also know that while the s orbital is not degenerate, the P orbital is degenerate. What this mean is that the p orbital is broken down into three different sub orbitals which is the Px , Py and Pz. Hence we can see that there are 6 electrons to enter into the P orbital too.
We can see that all the S orbitals have been completely filled with two electrons alike each. This is also the case for the P orbital as the 3 suborbitals take in 2 each to give a total of six
Answer:
A reaction between a strong acid and a weak base.
Explanation:
The conjugate acid of a weak base is a strong acid.

The reaction above is reversible, so we can write

Thus, the solution of the salt will be acidic, because it produces hydronium ions.
Example;
Ammonium chloride is the salt of a strong acid (HCl) and a weak base (NH₃).
Solutions of NH₄Cl are acidic.
A dentist is most likely to use x ray technology.