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Alexxandr [17]
2 years ago
12

Which statement is correct for the element of proton number 19?

Chemistry
1 answer:
BlackZzzverrR [31]2 years ago
8 0

Answer:

D

Explanation:

From periodic table : proton number 19  corresponds to K  (potassium)

  which is very reactive with water

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A substance containing atoms of different elements that are bonded together is called a(n):
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Answer:Molecules

Explanation:

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3 years ago
A motorcycle travel at 6.0 m/s. After 3.0 second, the motorcycle travel at 15.0 m/s. Which of the following was the average acce
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Hello!

\large\boxed{a = 3m/s^{2}}

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3 years ago
Can someone plz help me with this ​
lara31 [8.8K]

A would be states of matter

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3 years ago
A molecule of pentane is made of 5 carbon atoms and 12 hydrogen atoms. a collection of pentane molecules has 3.01 x 1024 carbon
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3.01 Ă— 10^24 Ă— (12/5) hydrogen atoms  
Looking at the formula for the molecule, the ratio of carbon to hydrogen atoms is 5:12, so if we divide the number of carbon atoms by 5 and then multiply by 12, we can find the number of hydrogen atoms. Let's look at the available options and see what makes sense.  
3.01 Ă— 10^24 Ă— (12/5) hydrogen atoms 
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(3.01 Ă— 10^24 / 5) hydrogen atoms 
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3.01 Ă— 10^24 Ă— 12 hydrogen atoms description 
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4 years ago
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