Democritus said that the atom was just a sphere.
Answer:
Matter
Compound
Explanation:
Caffeine is NOT an Element, because it is formed by different elements (C, H, N, and O).
Caffeine is NOT an Isotope, because this only applies to elements with the same atomic number but different mass number.
Caffeine is Matter because it has mass and occupies space by having volume.
Caffeine is a Compound because it has a formula with a <em>definite constant composition</em> of different elements.
If they are in the same row they have the same number of outer electrons on the same main shell also known as valence electrons
if they are in the same column they have the same number of valence electrons but on different main shells
<h2>C</h2>
Explanation:
The atomic number of S is 
So,number of electrons in S is
The electronic configuration of S is 
The orbital electronic configuration of S is 
So,the number of orbitals involved is 9.
