Answer:
It is less dense. It is also less dense than the oceanic crust.
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Be a chemist. Lol. Lessen waste, make chemicals more efficient, cure diseases... and stuff :)
Answer:
The five phases of matter. There are four natural states of matter: Solids, liquids, gases and plasma. The fifth state is the man-made Bose-Einstein condensates. In a solid, particles are packed tightly together so they don't move much.
Answer:
The number of neutron in the Aluminium Isotope is :
B. 14
Explanation:
Isotopes : These are the atoms which have same atomic number but have different mass number.
<u>This image shows the average atomic mass of Al element because it is in decimals</u>.
Atomic mass = 26.98154
(Note : mass number of single isotope can never be in decimals)
It is the average of mass of different isotopes of Al
Major Isotopes of
are :
......atomic mass = 26
.......atomic mass = 27
mass of Al given in image(26.98) is nearly equal to mass of 2nd isotope(27)
mass of ![_{13}^{26.98154}\textrm{Al}\ \approx 27](https://tex.z-dn.net/?f=_%7B13%7D%5E%7B26.98154%7D%5Ctextrm%7BAl%7D%5C%20%5Capprox%2027)
Now calculate the neutron in ![_{13}^{27}\textrm{Al}](https://tex.z-dn.net/?f=_%7B13%7D%5E%7B27%7D%5Ctextrm%7BAl%7D)
Number of neutron = mass number - atomic number
= 27 - 13
Number of neutron = 14
(Atomic mass is same as mass number)