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3. In a neutral atom, this element has an atomic mass of 23 AMU and has 11 protons.

What element is it

Sagot :

bharathparasad577

The element in question is Sodium

An atomic mass unit is defined as 1/12 th of the mass of carbon-12 atom.

The mass of an atom is mainly due to its protons and neutrons in the nucleus.

Weight of a proton is 1.6 x 10^-27 kg

Weight of a neutron is 1.6 x 10^-27kg

However weight of an electron is 9 x 10^-31kg and hence is negligible in calculation of amu

It is given that weight is 23 AMU and number of protons is 11

The protons in a nucleus also act as atomic number of the periodic table

Proton number 11 is the atomic number of Sodium

Hence the element is Sodium

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