HELP ASAP How is an atom of the metal calcium, which is in group 2 and period 4, most likely to attain a full outermost energy level of electrons?
1.The atom will share two electrons with another atom to form a covalent bond.
2.The atom will steal two electrons from another atom to become a +2 ion.
3.The atom will steal six electrons from other atoms to have a total of eight electrons in its outermost energy level.
4.The atom will allow its two outermost energy level electrons to be stripped away, resulting in a cation with a charge of +2.

this protocol provides a detailed procedure for agarose-based ip to purify and enrich the protein of interest.

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the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.