Mercury is in the 80th position in the periodic table. How many protons does it have?
2 answers:
Answer: 80
Explanation:
Elements are arranged in periodic table in order of increasing atomic number.
Atomic number is defined as the number of protons or number of electrons that are present in an atom.
Atomic number = Number of electrons = Number of protons
Mercury (Hg) is a d block element and its atomic number is 80, thus it contains 80 protons and 80 electrons.
Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom.
Electronic configuration of mercury in terms of noble gas configuration is .
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Answer:
Explanation:
The capacitance of the parallel-plate capacitor is given by
where
ϵ0 = 8.85x10-12 C2/N.m2 is the vacuum permittivity
k = 3.00 is the dielectric constant
is the area of the plates
d = 9.00 mm = 0.009 m is the separation between the plates
Substituting,
Now we can calculate the energy of the capacitor, given by:
where
C is the capacitance
V = 15.0 V is the potential difference
Substituting,