b. Atomic mass
c. atomic number
d. group or period
Answer:
atomic number
Explanation:
the atomic number is the same as the number of protons, you can identify it in the periodic table.
F = (mass)(acceleration) = ma
m = 55 kg
Vi = 20 m/s
t = 0.5 s
Vf = 0 m/s (since she was put to rest)
a=(Vf-Vi)/t
a=(0-20)/5
a = 40 m/s^2 (decelerating)
F = ma = (55 kg)(40 m/s^2)
F = 2200 N
Hope this answer will be a good help for you.
B. Melting of a substance
C. Boiling of a substance
D. Formation of a Preciptate
The atomic theory develop and change as the from the Bohr's model is that how electrons occupy the space using the scientific method from the philosophy.
The John Dalton develop the Proust's work and then change the atomic philosophy of the into the scientific theory. Scientists did not believe that the electrons move in the regions not in the orbits and then they uses the mathematics and quantum numbers for the explanation.
The Bohr's model is to describe the chemical properties of an atom. The experiments demonstrated that atoms of the same element contains the different masses as the number of the neutrons can vary and called as the isotopes of the same element.
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Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 9.96×10⁻¹⁸moles of copper are in 6,000,000 atoms of copper.
The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. The stoichiometry in the balanced chemical equation represents the number of moles of respective element.
we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number
mole =given number of atoms ÷ 6.022×10²³(Avogadro number)
given number of atoms of copper =6×10⁶atoms
Substituting the values
mole of copper=6×10⁶÷ 6.022×10²³
moles of copper = 9.96×10⁻¹⁸moles
Therefore, 9.96×10⁻¹⁸moles of copper are in 6,000,000 atoms of copper.
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