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o-na [289]
4 years ago
15

How is a covalent bond formed? An atom gives one or more of its electrons away to another atom. Two atoms share a pair of electr

ons in their outer shell. Valence electrons move freely through a set of positively charged ions. Two atoms chemically react to create a single atom of another element.
Biology
1 answer:
crimeas [40]4 years ago
3 0

Answer: Covalent bonds form when atoms share their valence electrons with other atoms to become a more stable molecule.

Explanation: Atoms form covalent bonds as a result of the Octet Rule. The Octet Rule states that all atoms in a molecule need to have eight electrons in their valence shell. This rule can be satisfied by sharing, losing or gaining electrons. A covalent bond allows atoms to satisfy the Octet Rule via sharing.

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Answer:

c and d.

Explanation:

a.  the total amount of matter and energy increased.

b. the total amount of matter and energy remained the same.

c. matter and energy were lost each time they changed forms.

d. matter and energy were lost each time they changed locations,

As organisms feed within an ecosystem, energy flows from one trophic level to the other while matter is converted from one form to another.

However, less and less energy becomes available to support life as energy moves through the ecosystem from producers to consumers as a result of energy loss to the ecosystem. In addition, matters are also lost during conversion from one form to another.

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Option c and d are correct.

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