For which of the following is the velocity constant (speed/direction does not change)? a) a cat escaping a dog by running in a straight line and then up a tree at a constant speed of 30 mph b) a cat escaping a dog by running in a straight line away from the dog and slowing down when danger is gone. c) a cat escaping a dog by running at a constant speed around and around the house until the dog gets bored. d) a cat ignoring the dog by sitting perfectly still.

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).

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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~ trueboss72