B. Troposphere, stratosphere, mesosphere, thermosphere
Answer:
the number of neutrons in an atom of the element is 10.
Explanation:
neutron: mass # -protons
neutron: 19 (18.9984 (rounded)) - 9
neutron: 19- 9 =10
whole number is equal to the number of protons.
Explanation:
For number 9. the answer is 668.23255199999
For number 10. the answer is 1029.7634968
For number 11. the answer is 856.7084
For number 12. the answer is 10.37559999999
Answer:
9.1747x10⁻²⁵g
Explanation:
The mass defect is the difference between the mass of a nucleus and the mass of its particles. The nucleus is formed by protons and neutrons. The atomic number of Cobalt is 27, which means that it has 27 protons in its nucleus. The number of neutrons is the mass (60) less than the number of protons, so it is 33.
Then:
Mass of 27 protons = 27 x 1.00728 = 27.19656 amu
Mass of 33 neutrons = 33 x 1.00867 = 33.28611 amu
Total mass = 60.48267 amu
Mass defect = 60.48267 - 59.9338
Mass defect = 0.54887 amu
1 amu = 1.66054x10⁻²⁴ g, so 0.54887 amu = 9.1747x10⁻²⁵g
