A covalent chemical bond is one in which:.a) outer-shell electrons of one atom are transferred to the inner electron shells of another atom. b) protons or neutrons are shared by two atoms so as to satisfy the requirements of both. c) the inner-shell electrons of one atom are transferred to the outer shell of another atom. d) electrons are removed from one atom and transferred to another atom so that the two atoms become oppositely charged. e) outer-shell electrons are shared by two atoms so as to satisfactorily fill the outer electron shells of both. f) an electron occupies a hybrid orbital located between the nuclei of two atoms.

A.outer-shell electrons of one atom are transferred to the inner electron shells of another atom.

Explanation:

In covalent chemical bond, outer shell share pair of electrons to fill both atoms outer shell. Covalent bond can be polar and non-polar. Hydrogen and carbon bonding is example of non-polar bonds; while hydrogen bonding with chlorine is polar covalent bond example

chemical properties are the characteristic of matter which can only be observed by changing the chemical identity of a sample like flammability reactivity and toxicity.

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.