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Does there have to be the same number of protons and neutrons in the nucleus?
No. Even atoms of the same element will vary in the number of neutrons in their nucleus. For example, carbon (6 protons) has isotopes with 6, 7, and 8 neutrons. The most common isotope of hydrogen (1 proton) does not have any neutrons. While the most common isotopes of the lighter elements generally have the same number of protons and neutrons, heavier elements will have more neutrons than protons. For example the most common most stable isotope of uranium (92 protons) has 146 neutrons.
Is the number of protons equal to the number of neutrons in an atom?
The number of neutrons in an atom CAN be equal to the number of protons and electrons, BUT IT IS NOT ALWAYS. You can find the number of neutrons in an atom by subtracting the atomic number from the mass number. The number is often the same among the lighter elements, but the ratio of neutrons to protons quickly grows larger than one (on average) as you go further along the periodic table.
An atoms mass number equals the combination of what two things?
The mass number of an element is equal to the sum of the elements neutrons and protons.
Do all elements have the same number of protons and neutrons?
Yes - e.g. Hydrogen has one proton AND one electron (to balance the proton's positive charge with the electron's negative charge). The chemical properties of elements are therefore determined by the number of Electrons in the atom's shell (and therefore Protons in the atom's nucleus). However neutrally (uncharged) particles may share the atom's nucleus with the Protons. These particles are called Neutrons - the numbers of these present in the nucleus form the ISOTOPES of each element.
In periodic table of elements it is the sum of the number of protons and neutrons of an atom.?
The sum of protons and neutrons is the atomic mass.
What particle control the 'weight' of an atom?
The weight of an atom is primarily controlled by the total number of protons and neutrons in its nucleus. Protons and neutrons have approximately the same weight, while electrons have negligible mass compared to protons and neutrons.
What is the name for the number of protons and neutrons in atoms and elements?
mass number
What are elements having same number of protons and neutrons called as?
Carbon Number of Protons/Electrons: 6 Number of Neutrons: 6
What particles make up the mass of an atom?
The number of protons
Can 2 different elements have the same neutrons and protons?
Each chemical element has a different number of protons; the number of neutrons can be similar.
Heavy elements contain more protons or neutron?
Heavy elements generally contain more neutrons than protons. This is because as the number of protons increases in heavier elements, the strong nuclear force needs additional neutrons to help offset the repulsive forces between the positively charged protons. This results in a higher neutron-to-proton ratio in heavier elements compared to lighter ones.
What two factors determine the atomic mass of an elements?
neutrons and protons
