The first one is correct cause first of all it's atomic number is 7 and second of all it's atomic mass is about 15
Answer:
Density of the substance is 0.7
Explanation:
4.2/6 = 0.7
<span>Whereas physical properties of a substance tells us about how the substance looks, smells, etc, the chemical properties of a substance basically tells us how the substance will react with other substances. Therefore, knowing the chemical property of a substance tells us how the substance reacts with others.Hope this helps. Let me know if you need additional help!</span><span />
Answer:
finding the mass percentage oven element in a compound might sound complicated, but the calculation is simple. For example, to determine the mass percentage of hydrogen in water H2O, divide the major mass of hydrogen by the total molar mass of water and then multiply the result by 100
Answer:
I believe it is B,fluorine to complete the octet rule
Explanation:
