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Mars2501 [29]
3 years ago
5

An atom of element X has one more shell of electrons than an atom of beryllium, but it has one less valence electron than beryll

ium. Which element is element X?
sodium (Na)

boron (B)

magnesium (Mg)

lithium (Li)
Physics
2 answers:
3241004551 [841]3 years ago
8 0
The correct answer is Sodium
KengaRu [80]3 years ago
7 0

Answer:

sodium (Na)

Explanation:

The valence electron configuration of the given elements are as follows:

Sodium (Na) = 3s¹

Boron (B) = 2s²2p¹

Magnesium (Mg) = 3s²

Lithium (Li) = 2s¹

The valence electron configuration of beryllium (Be) = 2s²

The outer shell in Na is 3s i.e. n = 3 relative to that of Be where n = 2

Also the valence shell in Na has 1 s electron i.e. one electron lower than Be.

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Dmitry_Shevchenko [17]

Correct Answer:

3.1375

Explanation:

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3 years ago
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iVinArrow [24]

Answer:

Decreases/Reduces

Explanation:

Fill in the blank:

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3 years ago
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Xelga [282]

Answer:

0

Explanation:

0 is the answer

6 0
2 years ago
What is the answer? Explain best and I will mark brainliest!
iVinArrow [24]
I would say B because it is near the ocean which can cause a tsunami but also because of the wind coming from the ocean (it might cause hurricanes and lots of storms) I’m not sure though but that’s what I think makes sense. Good Luck!
5 0
3 years ago
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According to Newton's first law of motion, what is required to make an object slow down? Enter your answer in the space provided
LenaWriter [7]

<u>Answer:</u>

According to newton's first law of motion, friction is required to make an object slow down.

<u>Explanation:</u>

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