1)This question is about the Periodic Table.a) How many elements are there in period 3 of the Periodic Table?(1)b)Place the first 3 elements of period 3 in order of increasing reactivity.(1)c) Explain your reasoning to part (b).(1)d) Mark with an × the statement that best ...
There are some physical barriers that limit our view of the universe. Namely, we can only observe the parts of the universe from areas where electromagnetic radiation has had time to reach our solar system. Thus, we don’t know what lies beyond the horizon of the observable universe, so wh...
1.how are the atomic numbers and the atomic masses of the elements related to how the elements are arranged on the periodic table?2.how does the number of electrons relate to the arrangement ?what is the different in the number of electrons in a 3rd period element and the 2nd period ...
At present, 118 elements are known to us. All these have different properties. Out of these 118, only 94 are naturally occurring.
In mathematics, a set is a systematic collection or group of numbers or entities. A set is always represents by the capital later of the alphabet and the elements of the set are written in the middle braces and separated by the commas. ...
How many electrons are there in a p sublevel? Sublevels: Evidence for the existence of sublevels within principle energy levels came from the study of successive ionization energies. Scientists found patterns in the successive ionization energies that they used to construct a model called electron ...
几道英语化学题!1.how are the atomic numbers and the atomic masses of the elements related to how the elements are arranged on the periodic table?2.how does the number of electrons relate to the arrangement what is the different in the number o
Atoms are the basis of all the elements in the universe, the building blocks of all visible matter, and the secret to nuclear power.
1.how are the atomic numbers and the atomic masses of the elements related to how the elements are arranged on the periodic table?2.how does the number of electrons relate to the arrangement what is the different in the number of electrons in a 3rd period element and the 2nd period ...
Many other elements are diamagnetic— their unpaired atoms create a field that weakly repels a magnet. A few materials don't react with magnets at all. This explanation and its underlying quantum physics are fairly complicated, and without them the idea of magnetic attraction can be mystifying....