Sulfur contains atoms in three energy shells.
Metals are the elements that usually lose electrons in their chemical reactions. This is because they have few electrons in their outermost shells which are easily lost.
3
This question is unclear. If you mean 3 full electron shells and nothing else, then it would be argon. But every element after argon has 3 full electron shells also, but they also have other shells with electrons. If you mean a full 3rd energy shell such as in having 3d10 electrons, then it would be Zn but Zn also has 4s2 electrons. So, the question is a vague one.
an insulator
If you are asking about the number of electrons then it would be 8. The first shell can hold a maximum number of 2 electrons. The second and third shell would have a maximum of 8 electrons each.
Metals are the elements that usually lose electrons in their chemical reactions. This is because they have few electrons in their outermost shells which are easily lost.
Because they both have a different number of valence electrons in their outer shells, and that is what determines the properties of the element.
3
5 shells and no electrons would be left over.
This question is unclear. If you mean 3 full electron shells and nothing else, then it would be argon. But every element after argon has 3 full electron shells also, but they also have other shells with electrons. If you mean a full 3rd energy shell such as in having 3d10 electrons, then it would be Zn but Zn also has 4s2 electrons. So, the question is a vague one.
That would be Neils Bohr
5 shells filled, no electrons left over.
This question is unclear. If you mean 3 full electron shells and nothing else, then it would be argon. But every element after argon has 3 full electron shells also, but they also have other shells with electrons. If you mean a full 3rd energy shell such as in having 3d10 electrons, then it would be Zn but Zn also has 4s2 electrons. So, the question is a vague one.
Both iodine and chlorine are halogens (group 17) and have 7 valence electrons.
similar, they comprise a family
Like all metals calcium will lose electrons.
an insulator