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astra-53 [7]
3 years ago
13

How to find proton electron and neutron on the perdioc table

Chemistry
1 answer:
Alika [10]3 years ago
3 0

Explanation:

The periodic table arranges elements based on their atomic numbers in a systematic fashion.

There are about 110 elements on the periodic table with each of them having their unique atomic numbers.

On periodic table, most atoms are designated as:

                       ₓⁿT

   T is the symbol of the atom

   X is the atomic number of the atom

   n is the mass number

Atomic number is the number of protons in atoms in an element. Protons are the positively charged particles.

Mass number is the number of protons and neutrons in an atom. Both protons and neutrons are in the nucleus of an atom.

  Atomic number = number of protons = number of electrons

Mass number = number of protons + number of neutrons

Number of neutrons = mass number - number of protons

Number of neutrons = mass number - atomic number

learn more:

Periodic table brainly.com/question/2014634

#learnwithBrainly

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If 17.8 grams of KOH dissolve in enough water to make a 198-gram solution, what is the concentration in percent by mass?
sleet_krkn [62]
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The text describes the first three reactions of a metabolic pathway. Complete the sentences. Not all the terms will be placed. I
Nina [5.8K]

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4 0
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Read 2 more answers
It takes 281.7 kJ of energy to remove 1 mole of electrons from the atoms on the surface of lithium metal. If lithium metal is ir
Alex17521 [72]

Answer:

The maximum kinetic energy of electron is = 2.93 × 10^{-19} Joule

Explanation:

We know that total energy

E = \frac{hc}{\lambda}  ------------ (1)

Here h = plank's constant = 6.62 × 10^{-34} J s

c = speed of light = 3 × 10^{8} \frac{m}{s}

\lambda = 261 nm = 261  × 10^{-9} m

Put all these values in equation (1) we get

E = 7.6   × 10^{-19} J

We know that

Total energy = Energy to remove an electron + K.E of electron

Energy to remove an electron = \frac{281.7 (1000)}{(6.023)10^{23} }

Energy to remove an electron = 4.67  × 10^{-19} J

K.E of electron = Total energy - Energy to remove an electron

K.E of electron = 7.6   × 10^{-19} -  4.67  × 10^{-19}

K.E of electron = 2.93 × 10^{-19} Joule

Therefore the maximum kinetic energy of electron is = 2.93 × 10^{-19} Joule

3 0
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