Question

how to calculate no. electrons and protons of lithium. plz tell how? fast...
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Answer 1

Answer:

Lithium Z = 3

No. of electrons = No. of Protons = Atomic number

electrons = protons = 3

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Answer 2

Explanation:$\huge\boxed{\fcolorbox{cyan}{pink}{Answer}}$

Reading the Periodic Table

The periodic table tells a lot of what you need to know about each element, including the number of electrons, protons and neutrons.

Take a look at the periodic table entry for carbon (see the Resources section). What information does the entry for carbon give you?

1. The biggest component is the chemical symbol for the element. For carbon this is C.

2. Above the symbol is the atomic number (Z) which is equal to the number of protons in the nucleus and the number of electrons in the electron cloud (given that the atom is neutral). For carbon Z=6.

3. Below the symbol is the atomic mass. While this number is a weighted average of the masses of all isotopes of the element, if you round the number to the nearest whole number you will find the mass number of the most common isotope. For carbon the mass number (M) is 12. This number is the sum of the number of protons and neutrons.

Now, you know that for a neutral carbon atom the number of electrons is six, the number of protons is six, but what is the number of neutrons? You can use the mass number to find this. Simply take M and subtract Z. For carbon this means that there are six neutrons.