5
an atom may have any number of electron shells, theoretically that is!
typically, the number of electrons that you can fit on the first few electron shells are 2 on the 1st, 8 on the 2nd, 18 on the 3rd, 18 (or sometimes 32) on the 4th, usually 32 for the 5th shell... and so on... it gets complicated and there are various rules for computing the number of electrons on each shell depending on if it a gas, metal, or many other things.
so, in general, the number of electron shells that an atom can have depends on the number of electrons in the atom! so the more electrons you put on an atom (whether you are making an ion, or going to bigger elements), the more electron shells it is going to have!
however, you couldn't really put an infinite number of electron shells on an atom (given that you have an infinite amount of electrons). this is because the atom gets very unstable as is gets bigger. uranium-235, for example, (which has 7 electron shells, and the corresponding number of electrons and protons) is much too unstable because its nucleus has too many protons and it wants to decay into 2 smaller atoms. so, in uranium-235's case, there are simply too many protons - and the same number of electrons, and hence a lagre number of electron shells - to be stable and remain one atom.
so, there is a limit to how many shells you can have, but it would depend on the stability of the atom. although, i suppose you could theoretically create an atom (in a lab) with an obscenely high number of electrons for a fraction of a second before it decayed.
so in short, there is no theoretical limit, but there is a practical, dependant limit. if i had to guess as to what this real limit is for the atoms which we know, i would say it is about 7, maybe 8, but i very much doubt it.
The correct answer is <em>c.pinocytosis – liquids secreted from the cell </em>
Explanation:
<em>Pinocytosis</em> is a type of endocytosis in which substances are internalized into the cell from the celullar exterior. The components are not secreted from the cell but are uptaken into the cell. This internalization process is characterized by the formation of an invagination of the cell membrane where then is formed a vesicle surrounding the component to be uptaken.
It could be said that the astronomer who placed the sun in the center of the solar system was Copernicus. He developed the model of the universe that placed the Sun in the center rather than the Earth. It was considered the Copernican Revolution because of its contribution to science and the change of paradigm.
"simple aerobic bacteria"relating
to or denoting exercise that improves or is intended to improve the
efficiency of the body's cardiovascular system in absorbing and
transporting oxygen.