It's do at 11 please help. 5. Be prepared to prove your understanding of atomic shells.

6. Understand the basics of isotopes and ions.

7. Know about the term "valence" and how it is used with regard to the atom.

8. Know the basics of acids and bases.

9. Understand the organization of the elements in the periodic table.

6.)Isotopy is a phenomenon whereby atoms of an element exhibit different mass numbers but have the same atomic number. Ion is any atom or group of atoms which possesses an electric charge.

8.) Acid is a substance which produces hydrogen ions (or protons) as the only positive ion when dissolved in water.Base is a substance which will will neutralize an acid to yield a salt and water only.

7.) Valency is the combining power of an element or radical.It is actually the oxidation number assigned to the element or group of elements.

5.) Atomic shells are K,L,M,N.The electrons are negatively charged and revolve around the nucleus in spherical regions called shells or energy levels.

9.) Families of Element:Group 1 &2 make up the s-block.Group 3 to 7 and 0 form the p-block.The transition elements occurs between Groups 2 and 3 in the periodic table.They form the d-block because they contain d electrons in addition to the s and p electron.The lanthanides and actinides also occurs between group 2 and 3 in periods 6 and 7 respectively. They form the f-block because they contain f electrons in addition to the s,p and d electrons.

I hope this helps

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but