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Isotopes of an element have same number of protons and different number of neutrons. Hence similar in chemical properties and different in physical properties.

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WHAT Equals the sum of the number of neutrons and protons in an isotope?

The atomic mass equals neutrons and protons. This is true in non isotopes as well.


What is true about what's in the nucleus of every atom of He no matter what Isotope?

There are always two protons.


Is this true that a normal atom of oxygen has a mass of 16 the isotope oxygen 18 and protons 18?

An atom of oxygen typically has 8 protons, 8 neutrons, and 8 electrons, giving it a mass number of 16. Oxygen-18, on the other hand, has 8 protons and 10 neutrons, totaling a mass number of 18.


Why does boron-11 have 5 protons and 5 neutrons?

Boron-11 is an isotope. The atomic number of Boron is 5 which means it has 5 protons, (if there were more or less protons the element wouldn't be boron). the isotope number (11) is the number of protons plus neutrons. to find out the number of neutrons you would take take the isotope and subtract it by number of protons (11-5) which yields 6. To find the isotope add the number of protons to the number of neutrons.


How many protons are in a isotope oxygen atom?

All the oxygen isotopes, natural or artificial, has 8 protons, because th atomic number of oxygen is 8.


Why is the einsteinium atomic mass a whole number?

For elements with no stable isotopes, the mass number of the isotope with the longest half-life is used.


How are atoms different from one another?

They are different because of the number of electrons in there electron cloud. True, the number of electrons are specific to the type of atom but so are the number of protons. The atomic number of the atom is directly related to the number of protons and electrons it has. So carbon for example is given the atomic number 6. Thus it has 6 protons and 6 electrons. It's atomic mass is 12.0107 amu. This we can round to 12. To aquire the atomic mass of a given element you add the number of protons and nuetrons together since the electrons are so infinitely small they are not considered to have any mass. We know from the atomic number that carbon has 6 protons, it's atomic mass is 12, so that means the number of nuetrons must also be 6. This doesn't exactly answer the question though. The obvious things that differentiate one atom from another are their atomic number, the number of protons and electrons inside an atom, and their atomic mass.


Is The identity of an element is determined by the number of protons?

Yes, it is true, the number of protons is equal to atmic number.


Is it true that the periodic table is arranged by the number of neutrons?

No. For the most part, it is arranged by the number of protons. But even here there are exceptions.


Is it true that the number of protons is different for the two isotopes?

Not; the number of protons in isotopes is identical; only the number of neutrons is different.


Is it true that the mass number is the number of protons and neutrons?

Yes, this is the definition of mass number.


Why does francium not have a proton number?

It is not true: francium has 87 protons.