49 neutrons in each nucleus.
<h3>Explanation</h3>
For each nucleus:
Mass number = Number of protons + Number of neutrons.
The atomic number of a nucleus is the same as its number of protons. The atomic number of the nucleus here is 31. There are 31 protons in each nucleus.
- Mass number = 80;
- Number of protons = Atomic number = 31;
- The number of neutrons is to be found.
Again,
Mass number = Number of protons + Number of neutrons.
80 = 31 + Number of neutrons.
Number of neutrons = 80 - 31 = 49.
Answer:
40 kilograms of fuel are required to meet their energy needs for the month of April.
Explanation:
The month of April has 30 days and the full energy needed by the family is determine by the following combustion formula, derived from dimension analysis:
(1)
Where:
- Mass of the fuel, measured in kilograms.
- Calorific value of the fuel, measured in kilojoules per kilogram.
- Daily fuel energy, measured in kilojoules.
- Number of days of the month, dimensionless.
If we know that , and , then the amount of fuel required to meet their energy needs for the month of April is:
40 kilograms of fuel are required to meet their energy needs for the month of April.
Answer: None of these rabbits listed. they are all different species
Explanation:
I got it right on usatestprep
Answer:
the 4s subshell is lower in energy than the 3d subshell
Explanation:
In the element number 24 which is chromium
the electronic configuration should be according to Aufbau principle
will be =
but in reality it is =
The 6 electrons in the outermost shell will be divided as 5 in 3d subshell and 1 in 4s shell, because half filled orbital will be more stable than .
Answer:
see attached
Explanation:
Two methods are shown in attached notes... Method I is based upon Experimental Rate Trends; Method II is the 'Ratio Method'.