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The total weight of the protons and the neutrons.
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Which two subatomic particles make up the atomic weight of an atom of an element?
Protons and neutrons make up the atomic weight of an atom. Protons have a positive charge and are found in the nucleus, while neutrons have no charge and are also located in the nucleus. The total number of protons and neutrons determines the atomic weight of an atom.
What makes up the weight an atom or molecule?
The number of protons and neutrons controls the weight of an atom.
What is the weight of the atom if an atom has 9 protons?
The weight (mass) of an atom with 9 protons will vary depending on the number of neutrons. 9 protons defines the atom as fluorine (F), and it can have 10 protons, making the mass 19 amu, or it can have a mass of 14 amu up to 31 amu, but the only stable isotope is the one with a weight (atomic mass) of 19 amu.
How do you find out what atom has what with only the electrons?
An atom (as from the Periodic Table, which have no charge) will have the same amount of protons as electrons. The atomic number is the amount of protons an atom has. Lithium has an atomic number of 3, which means it's nucleus contains 3 protons, and in turn 3 electrons. Once you identify the atom based on it's atomic number, and find it on the periodic table, you can see it's symbol, and weight. The atomic weight is the amount of protons and neutrons added together, both weighing 1 amu (*atomic mass units*: The unit that protons and neutrons are measured). Lithium has an atomic weight of 6.94, so the amount of protons (3) subtracted from 6.94 is 3.94. Now we round up to the nearest whole number and we have 4. Four is the amount of neutrons an atom of Lithium has.
Which subatomic particles of an atom are responsible for atomic mass?
Protons and neutrons are responsible for the atomic mass of an atom. Protons have a positive charge, while neutrons have no charge. The combined mass of protons and neutrons makes up the majority of the mass of an atom.
What two parts of the atom make up the atomic weight of the atom?
The protons and the neutrons.
Which two subatomic particles make up the atomic weight of an atom of an element?
Protons and neutrons make up the atomic weight of an atom. Protons have a positive charge and are found in the nucleus, while neutrons have no charge and are also located in the nucleus. The total number of protons and neutrons determines the atomic weight of an atom.
What is an atomic atom?
It's what everything in this world is made up of. It makes up matter.
What sub atomic particles makes up mass of an atom?
Protons and neutrons
What makes up the weight an atom or molecule?
The number of protons and neutrons controls the weight of an atom.
Which sub atomic particle makes up most of the mass of atom?
These particles are proton and neutron.
What is the weight of the atom if an atom has 9 protons?
The weight (mass) of an atom with 9 protons will vary depending on the number of neutrons. 9 protons defines the atom as fluorine (F), and it can have 10 protons, making the mass 19 amu, or it can have a mass of 14 amu up to 31 amu, but the only stable isotope is the one with a weight (atomic mass) of 19 amu.
How is atomic weight different than an atomic number?
atomic weight goes up faster
How can you predict an atoms approximate weight if you know its atomic number?
The atomic number is the number of protons or electrons in an atom (there are the same amount of protons and electrons in an atom unless it's positively or negatively charged). The atomic weight is the average weight of the protons or electrons plus the neutrons of all the different isotopes of the atom. That's one of the reasons why the atomic weight of each element on the table of elements is not an integer. If you multiply the atomic number by two, you'll have a fair estimate of the atomic weight for the top part of the periodic table. For the heavier elements, this will come up a little bit light.
What elements do helium make up?
The only element helium makes up is helium. Atomic number: 2 Atomic weight 4.00260 u (avg)
Protons and neutrons in the nucleus add up to give the?
The number of protons added to the number of neutrons in a nucleus give that isotope's atomic weight.
How many neutrons are in antimony 122?
You look up antimony. You discover its symbol is SB. You look on your periodic table. You come to the symbol SB. You see that it is number 51. You know that is also the number of protons in the atom. You know that 122 is the atomic weight. You know that the Atomic Weight mainly comes from the weight of the neutrons and protons. You know that when you have the atomic weight you can subtract the atomic number from the atomic weight and get the number of neutrons.
