Groundwater is formed in one of several ways. It can trickle down through the sand and rock from the rain and other types of precipitation. Groundwater can also come from underground streams or rivers or even from the aquifer that is located beneath the rocks under the ground. This water has existed from the beginning of time and moves through a cycle. It evaporates, becomes rain, falls back to the Earth, and then continues into the ground.
Answer: 3.29 × 1023 atoms
Answer:
i) 24.305 u
iv) The number of protons determines an element's atomic number and is used to distinguish one element from another.
Atomic radius decreases with the increase of atomic number and mass number because the nuclear charge attracts the outermost shell leads to lower distance of the atom.
<h3>
What is the trend of atomic radius across the periodic table?</h3>
Atomic radius decreases when we go from left to right to a period and increases down a group. In a period, effective nuclear charge increases as electron shielding remains the same. An atom gets larger as the number of orbits or shells increases. The radius of atoms increases as you go down the group in the periodic table. The size of an atom will decrease as you move from left to the right in a period. Within a period, protons are added to the nucleus which attracts electrons closer to the nucleus because of its increased positive charge i.e. proton. So that's why we can say that the force of attraction between nuclei and electrons increases, the atomic radius of the atoms decreases.
So we can conclude that Atomic radius decreases with the increase of atomic number and mass number because the nuclear charge attracts the outermost shell leads to lower distance of the atom.
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