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ryzh [129]
3 years ago
8

How many neutrons does element X have if it’s atomic number is 28 and it’s mass number is 81?

Physics
2 answers:
Sedaia [141]3 years ago
8 0

The answer is 53,hope this help

Sauron [17]3 years ago
3 0

Answer:

53

Explanation:

M-A=N

Mass-Atomic #= Neutrons

81-28= 53

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Answer:

<em>The magnitude of vector d is 16 and the angle with the x-axis is 270°</em>

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<u>Operations With Vectors</u>

Given two vectors in rectangular components:

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\vec a+\vec b=(ax+bx,ay+by)

The difference between the vectors is:

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3 years ago
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