I know that we can find how old the Earth is by knowing how much uranium ultimately decayed into lead. Uranium-238 has a very long to decay, about 4.5 billion years. So that is how we are able to understand how old the Earth is.
Missing question: <span>Assume a density of 10.35 g/cm3 for Ag, A(Ag) = 107.87 g/mol.
N(Ag) = Na </span>· d(Ag) ÷ A(Ag).
N(Ag) = 6,023·10²³ atoms/mol · 10,35 g/cm³ · 10⁶ cm³/m³ ÷ 107,87 g/mol.
N(Ag) = 5,78·10²⁸ atoms/mol.
Nv = 5,78·10²⁸ atoms/mol · 5·10⁻⁵.
Nv = 2,89·10²².
60
Explanation:
The number of electrons in an atom of Q-95 will be 60 electrons.
The atomic number of an atom is the number of protons in the atom of the isotope
This number is unique to every atom and their isotope
An isotope of an atom is the existence of an atom having the same atomic number but different mass numbers.
Since atomic number the same as number of protons, they are the positively charged particles in an atom.
To have a negative charge, the number of electrons must be more than that of protons.
Charge = number of protons - number electrons
charge = -1
-1 = 59 - number of electrons
Number of electrons = 60 electrons
learn more:
Number of subatomic particles brainly.com/question/2757829
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Because they create their own food, they are considered as producers.
