Deduce the number of each sub-atom particle in an atom of 84Kr?.
Kr 84.
Atomic number is 36; therefore, it has 36 protons and 36 electrons. The mass number is 84. we know that
mass number = number of protons + number of neutrons. Since mass number is 84 and number of protons is 36, then 84 - 36 will give the number of neutrons. Check my arithmetic. Look at the periodic table to make sure I copied all of the numbers correctly.
To deduce the number of each subatomic particle in an atom of 84Kr (krypton), we can refer to the periodic table.
1. Find the atomic number: The atomic number of krypton (Kr) is 36, as indicated on the periodic table.
2. Protons: The atomic number also represents the number of protons in an atom. Therefore, in an atom of 84Kr, there are 36 protons.
3. Electrons: In a neutral atom, the number of electrons is the same as the number of protons. So, in an atom of 84Kr, there are also 36 electrons.
4. Neutrons: To find the number of neutrons, we subtract the atomic number from the atomic mass. The atomic mass of krypton is approximately 84. Therefore, the number of neutrons in an atom of 84Kr would be 84 - 36 = 48 neutrons.
To summarize:
- Protons: 36
- Electrons: 36
- Neutrons: 48
To deduce the number of each subatomic particle in an atom of 84Kr (krypton), we can refer to the periodic table and use the concept of atomic number and atomic mass number. The atomic number (Z) represents the number of protons in the nucleus, while the atomic mass number (A) represents the sum of protons and neutrons.
1. Find the atomic number (Z) of krypton:
Krypton's atomic number is 36, which means it has 36 protons in its nucleus.
2. Find the atomic mass number (A) of krypton:
The atomic mass number of krypton, 84Kr, is 84.
3. Deduce the number of neutrons:
Subtract the atomic number (Z) from the atomic mass number (A):
Number of neutrons = Atomic mass number (A) - Atomic number (Z)
Number of neutrons = 84 - 36 = 48
4. Deduce the number of electrons:
In a neutral atom, the number of electrons is equal to the number of protons.
Hence, the number of electrons in 84Kr is also 36.
5. Deduce the number of protons:
The atomic number (Z) already represents the number of protons, which is 36 in this case.
Therefore, in an atom of 84Kr, there are 36 protons, 48 neutrons, and 36 electrons.