I believe A. Nitrogen is the most abundant Gas.
Answer:
A carbon atom can form up to four covalent bonds as one carbon atom has four valence electrons (in outermost shell). It is a fact that the number of valence electrons in a atom determines the number of covalent bonds it will form. Thus, each electron in carbon atom is used to form four covalent bonds with various four atoms.
Explanation:
A bond between a carbon and hydrogen atom is a non-polar covalent bond. The non-polar covalent bond are the bonds between two atoms which share equal number of electron(s) with each other. Example: as in case of methane, where one carbon atom shares its 4 outer valence electrons with four hydrogens by sharing equal number of electron.
In contrast, polar covalant bond are the bonds between two atoms which share unequal number of electron(s) with each other. Thus these bonds are partially ionic.
Organisms need energy to conduct essential life activities. Basically, energy is essential to every organisms because it is their source of power to get food and to reproduce. Without it, organisms would not function properly and will soon die.
The correct answer fro above statement is:
<h3> c. Half of all rainforest plants have been tested for their medicinal properties.</h3><h3>Explanation:</h3>
Twenty-five percent of the fresh components in cancer medications are particularly rainforest plants.Rainforests are essential because they serve control global climate trims and rain. Water that disappears from trees comes in other regions as rain.Twenty-five percent of Western pharmaceuticals are obtained from rainforest components. But since only a minute portion of rainforest organisms have been investigated, as the rainforest species escape so do possible remedies and therapies for life-threatening disorders.
