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earnstyle [38]
3 years ago
14

How many protons are in an element with an atomic number of 8 and a mass number of 18?

Mathematics
2 answers:
Orlov [11]3 years ago
8 0
A)8,atomic number also means proton number
aleksandrvk [35]3 years ago
4 0
Since the atomic number is 8 that will be the number of protons given that the element is a neutral element meaning that the number of protons and electrons are the same. Therefore the answer is 8
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Can't seem to figure out this problem. Can anyone help?
Juli2301 [7.4K]
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8 0
3 years ago
find x if the distance between points L and M is 15 and point M is located in the first quadrant. L=(-6,2) M=(x,2)​
aivan3 [116]

Answer:

Therefore,

x = 9

Step-by-step explanation:

Given:

Let,  

point L( x₁ , y₁) ≡ ( -6 , 2)

point M( x₂ , y₂ )≡ (x , 2)

l(AB) = 15 units  (distance between points L and M)

To Find:    

x = ?

Solution:  

Distance formula between Two points is given as

l(LM)^{2} = (x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2}

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15^{2}=(x--6)^{2}+(2-2)^{2}\\\\225=(x+6)^{2}

Square Rooting we get

(x+6)=\pm \sqrt{225}=\pm 15\\\\x+6 = 15\ or\ x+6 = -15\\\\x= 9\ or\ x = -21

As  point M is located in the first quadrant

x coordinate and y coordinate are positive

So x = -21 DISCARDED

Hence,

x = 9

Therefore,

x = 9

3 0
3 years ago
What's the answer ?<br><br><br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B245%20%2B%2044%7D%20" id="TexFormula1" title=" \sq
-Dominant- [34]

\huge\mathfrak\pink{Answer...}

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8 0
2 years ago
Read 2 more answers
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egoroff_w [7]
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3 years ago
25+ POINTS WILL MARK BRAINLIEST
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Answer:

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Point B = (0,4)

7 0
3 years ago
Read 2 more answers
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