Which can lead scientists to change a theory that has already been accepted? check all that apply.

The correct answer will be options-

1. new hypothesis

2. technological inventions

3. repetition of the experiment

Explanation:

A scientific theory is a well-substantiated statement which explains any natural phenomenon in depth.

A theory is the elaborate explanation of the predicted hypothesis which becomes a theory when it has proved by the researcher and the fellow scientists.  

The life of a theory is durable which can be changed or modified when a new hypothesis is generated on the same issue or scientific question which explains the phenomenon more accurately.

The advancement in the technology can add knowledge to the existed theory which could lead to the modification of the theory. Also, if the repetition of the results of the old experiment does not support the theory can lead to the change in the theory.

Thus, the selected options are the correct answer.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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