4 years ago

A valid lewis structure of ________ cannot be drawn without violating the octet rule. select one:

1 answer:

6 0

<span>Selenium has 6 valence electrons, shares four of them with the four F atoms and has a pair of electrons left over, so has l0 electrons in its outer energy level. Choice A</span>

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How to purify ammonia

padilas [110]

In order to purify ammonia to high purity, two basic methods are used. The older one consists in passing gaseous ammonia containing 80 ppm of impurities under atmospheric pressure through liquid ammonia with dissolved metallic sodium.

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3 years ago

The diagram below shows earth as viewed from space as it moves around the sun approximately how long does it take earth to move

andriy [413]

Answer:

It would take 12 hours.

Explanation:

It takes 24 hours to move from point A back to it's position. So if it goes half way you divide by two and you get 12. So it would be B.

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3 years ago

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The electron configuration 1s2 is correct for an element that has 2 electrons, both in the first principle energy level