Energy radiated from a hot object is carried in .

Photons

Explanation:

A hot object emits photons of various energies, which propagate outwards from the object. When they hit another object, the photons can be absorbed, giving up their energy to the second object. This causes the atoms/molecules etc. to giggle around, rotate, vibrate etc., with the result that the second object heats up.

In addition to the sun, light bulbs, irons, and toasters also transfer heat via radiation.

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms