Will mark ! which of the following is the electron configuration of an electrically neutral alkaline earth metal a. 1s2 2s1 b. 1s2 2s2 2p2 c. 1s2 2s2 2p6 3s1 d. 1s2 2s2 2p6 3s2 3p6 4s2 i feel like the answer is d, but i’m not sure.

1s2 2s2 2p6 3s2 3p6 4s2

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).

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3