Polyatomic ions
a. are a result of ionic bonds.
b. contain covalent bonds.
c. contain both ionic and covalent bonds.
d. are always charged.
e. both band d.

zfoods? ok, pressure is used to keep the heat inside and to keep the food perfect.

particle   p is an electron and particle q is a neutron

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).

b.

the accuracy of the data.