The atomic mass number does<span> not change because a </span>beta<span> particle has a much smaller </span>mass<span> than the </span>atom<span>. The </span>atomic number<span> goes up because a neutron has turned into an extra proton. </span>Beta decay<span> is fundamentally different from alpha </span>decay<span>. An alpha particle is made of two protons and two neutrons.</span>
The bond between Potassium and Bromide is considered iconic, Because of how they lose electrons and become ions when they bond together.
I think the answer to this question will be +7kj/mol
It took 380,000 years for electrons to be trapped in orbits around nuclei, forming the first atoms.
These were mainly helium and hydrogen, which are still by far the most abundant elements in the universe. Present observations suggest that the first stars formed from clouds of gas around 150–200 million years after the Big Bang. Heavier atoms such as carbon, oxygen and iron, have since been continuously produced in the hearts of stars and catapulted throughout the universe in spectacular stellar explosions called supernovae.
The mass of 2.1 moles of the hydrate Nickel (II) carbonate pentahydrate NiCO3 x 5H2O 773.5 grams.
<h3>What are moles?</h3>
Mole is the smallest particle of atom which is equal to the Avogadro's number which is 2.303 × 10²³moles of an atom and can be calculated by,
number of moles = mass of mole / molar mass of the mole.
mass = 2.1 moles
molar mass of NiCO3 x 5H2O = 368.38
Substituting the value in the formula,
2.1 mole = mass of mole / 368.38
mass of mole = 773.59 grams.
Therefore, mass of 2.1 moles of the hydrate Nickel (II) carbonate pentahydrate NiCO3 x 5H2O 773.5 grams.
Learn more about moles, here:
brainly.com/question/26416088
#SPJ1
