Fluorine
Explanation:
F- has the lowest ionisation energy
Like all other krypton atoms, krypton-85 has a unique structure determined by its atomic number and mass number.
Krypton's atomic number is 36, which indicates that it has 36 protons in its nucleus. Krypton-85 is a radioactive isotope of krypton and has 85 nucleons (protons and neutrons) in its nucleus. Its mass number is 85.
An atom of krypton-85 has the following electrical structure:
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶
The krypton-85 atom has 36 electrons spread over various electron shells and orbitals in this electron configuration.
Learn more about krypton-85, here:
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a. True
b. False
Answer:
The correct option is B) false.
Explanation:
Absolute zero is the point where it is not feasible to cool further.
The lowest possible temperature is 0 kelvin which is also known as absolute zero. In degrees its corresponds to –273.15 degrees Celsius.
it is not possible to reach or cool a substance to absolute zero although nearby temperatures can be reached.
Consider the provided statement.
Researchers have now been able to cool substances to absolute zero is a false statement.
The correct option is B) false.
(2) 12 atomic mass units
(3) the mass of one mole of carbon atoms
(4) the mass of 12 moles of carbon atoms
The mass of a proton is approximately equal to 1 atomic mass unit (AMU), which is much lighter than the weight of a mole of carbon atoms or 12 moles of carbon atoms.
The mass of a proton is approximately equal to 1 atomic mass unit (AMU). This measurement is a standardized unit of mass that physicists and chemists use to express the atomic and molecular weights of elements.
The proton, along with the neutron, makes up the nucleus of an atom, and both have approximately the same mass, which is about 1 AMU. This is substantially lighter than the weight of one mole of carbon atoms (approximately 12 grams), and even more so compared to the mass of 12 moles of carbon atoms.
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B) SrI2
C) SrO
D) SrS