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Q: If a sodium atom has 11 protons and 12 neutrons what is its mass number?
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How many protons neutrons and electrons are there in a sodium atom?

Electrons~ 11 Neutrons~11 12Protons~11Youre welcome(;___________________________ (Improved answer) No, It has 11 electrons, 11 protons and 12 neutrons.


How many neutrons and protons does neutral atom of sodium with an atomic mass number of 23 have?

Every sodium atom has 11 protons, the atomic number of sodium. The isotope with mass number 23 has (23 - 11) or 12 neutrons, because the mass number of an isotope is defined as the sum of the numbers of protons and neutrons in the isotope.


How does an atom of sodium has a larger mass than a atom of neon. how is this possible when neon has so many more valence electrons?

sodium has more protons and neutrons. electrons have practically no mass, valence electrons are just outer orbital electrons. sodium has 11 protons, 11 electrons, and 12 neutrons. Mass is 23. neon has 10 protons, 10 electrons, and 10 neutrons. Mass is just 20. The neon atom has 10 protons and 10 neutrons for a mass number of 20. The sodium atom has 11 protons and 12 neutrons for a mass number of 23. The number of valence electrons has no bearing on mass number or atomic weight.


How many protons and neutrons do atoms of the same element have?

Atoms of the same element usually have the same number of protons but differ slightly in the number of neutrons. The number of neutrons are usually about the number of protons so it can be estimated as so. For example, there are two relatively common isotopes of sodium: sodium 22 and sodium 23, where the number is the total number of protons and neutrons. Sodium 22 has 11 neutrons and sodium 23 has 12 neutrons but the sodium atom has 11 protons. For further information, look up isotopes.


How many neutrons and protons does a neutral atom of sodium with an atomic mass number of 23 have?

Every sodium atom has 11 protons, the atomic number of sodium. The isotope with mass number 23 has (23 - 11) or 12 neutrons, because the mass number of an isotope is defined as the sum of the numbers of protons and neutrons in the isotope.


What is the atomic numbers of a sodium atom that has 11 protons and 12 neutrons?

Sodium's atomic number is always 11 and is always the same as its protons.


What is the atomic number and mass number of an atom with 11 protons and 12 neutrons?

Its atomic number is 11 and its mass is 22.99. This atom is a sodium atom.


What is the Atomic number of Sodium-23?

Mass number is the number of protons and neutrons in the nucleus of an atom. Atomic number on the periodic table is the number of protons in the nucleus of an atom. mass number - atomic number = number of neutrons The atomic number of sodium is 11. Specified mass number is 23. Therefore, 23-11 = 12 neutrons


What isotope has 11 protons12 neutrons and 11 electrons?

The number of protons in an atom determines what that atom is called. Therefore, sodium, or Na, always has 11 protons. The particular isotope of sodium that has 12 neutrons is called 23Na, and is the only stable isotope of sodium.


Do protons have electrons?

Not necessarily, the number of protons in an atom are exactly the same as the electrons in an atom. For example, sodium has 11 protons and 12 neutrons. How many electrons does it have? 11.


If an atom contains 11 protons and12 neutrons its atomic number is?

It has 11 protons, so its atomic no. is 11. It is Sodium.


What is the atomic number of a atom that has 11 protons and 12 neutrons?

Sodium's atomic number is always 11 and is always the same as its protons.