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An atom with a mass number of 45 has three more neutrons than protons What is the atomic number of this atom?
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∙ 14y ago
The atomic number is 21: The mass number is the sum of protons and neutrons, while the atomic number is the number of protons, designated n. From the statement of the problem, n+n+3 = 45, or 2n = 42, or n=21.
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∙ 14y ago
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How many protons neutrons and electrons are there in sulfur?
There are 16 protons, 16 neutrons and 16 electrons in a Sulfur atom. *note it's atomic number- this is the number of protons in an atom of an element. There must be the same number of electrons to balance the charge. The atomic weight minus the number of protons gives you the number of neutrons
True or false The number of neutrons is equal to the atomic number?
This would be false. The atomic number is equal to the number of protons and the neutrons are the number you add to protons to equal the mass number (to find round the atomic weight).
How many protons and neutrons are there in the sulfur 36 isotope?
The sulfur atom has 16 protons and 16 electrons.The three stable isotopes of sulfur differ in their neutron number:Isotopes with mass number -32, -33 or -34 have 16, 17 or 18 neutrons respectively. The isotope with mass number 32 is the most abundant natural isotope.
How many protons neutrons electrons in the nucleus of chlorine?
Chlorine atom has 17 protons and 17 electrons. The number of neutrons depends on the isotope considered. Chlorine has four isotopes: Cl-35, Cl-36, Cl-37 and Cl-38 with 18, 19, 20 and 21 neutrons respectively. However out of these, Cl-35 and Cl-37 are the most stable isotopes.
Are the number of protons always equal to the number of neutrons?
No, in fact, they rarely are equal. There are different forms of the same type of atom. For example, there are three isotopes of Hydrogen, an element that has one proton. Hydrogen-1 has no neutrons. Hydrogen-2 has one neutron. Hydrogen-3 has two neutrons.
How many protons are in a lithium nucleus?
The atomic number of lithium is 3. Therefor there are 3 protons and neutron in the nucleus of lithium. Lithium also has 4 neutrons. atomic # = protons and neutrons neutrons = rounded atomic mass - atomic number Sources- 7th grade Acc. Science
Can you identify an atom without knowing number of neutrons in it?
Yes, and in order to find the Number of Neutrons, subtract Atomic Mass from Number Of Protons, the result will be the Number of Neutrons for that atom *No. Of Neutron=Atomic Mass - Number Of Protons
A Lithium atom has an atomic mass of 6 How many neutrons does this atom have?
This atom has three neutrons. The atomic mass number is the sum of the protons and neutrons. All atoms of the same element have the same number of protons (lithium has three), so the neutrons have to account for the rest of the mass. 6 (the mass number)-3 (the number of protons in a lithium atom)=3. So this atom must have three neutrons.
What is the total number of neutrons in an atom of 7 lithium 3?
The atomic number of lithium is 3, which means that there are three protons. The number of neutrons depends on the mass number of the particular lithium isotope. Mass number is the SUM of the protons and neutrons. An atomic number of 3 and a mass number of 7 means that there are three protons and four neutrons. Lithium has two stable isotopes, Li-6 and Li-7 which means that there are 3 or 4 neutrons, respectively. The atomic number of lithium is 3, which means that there are three protons. The number of neutrons depends on the mass number of the particular lithium isotope. Mass number is the SUM of the protons and neutrons. An atomic number of 3 and a mass number of 7 means that there are three protons and four neutrons. Lithium has two stable isotopes, Li-6 and Li-7 which means that there are 3 or 4 neutrons, respectively.
How many protons neutrons and electrons would an atom of neon have?
- The atomic symbol is only an abridged form of the name of a chemical element. - The chemical symbol of neon is Ne; the atomic number is 10. - The atomic number is equal to the number of protons and electrons. - Number of neutrons = Atomic mass of an isotope - Atomic number
Protons electrons and neutrons are the three main parts of these?
Protons, electrons, and neutrons are the three main parts of atoms. In an atom, the nucleus contains the protons and neutrons, the electrons are found in shells around the nucleus. On the periodic table, the atomic number tells you the number of protons of an element.
How do you find how many protons electrons and neutrons are in an atom?
The amount of protons is the same as the Atomic Number of the atom. Also the same goes for the amount of electrons. The number of neutrons in an atom would be the atomic mass minus the number of protons, neutrons, or atomic number. (it doesn't matter which of the three you use because they are all the same number) For example Titanium has an atomic number of 22, protons 22, and electrons 22. The atomic mass is 47, so to find the amount of neutrons you would take the atomic mass (47) minus the atomic number, protons, or electrons (22). So this would be your equation... Atomic mass - electrons (or whichever you choose) equals number of neutrons. So-> 47-22=25 neutrons.
Why can't the mass number be smaller than the atomic number?
The mass number has to be greater then the atomic number because the mass number is the protons plus the neutrons. If you were to take 10-12 you would get a negative number of 2 and there can't be a negative number of neutrons!
How do you use atomic number and average atomic mass to calculate the number of each of the three subatomic particles?
The atomic number is the amount of protons which will equal the amount of electrons. The average atomic mass minus the number of protons will equal the amount of neutrons.
How many protons neutrons and electrons are there in sulfur?
There are 16 protons, 16 neutrons and 16 electrons in a Sulfur atom. *note it's atomic number- this is the number of protons in an atom of an element. There must be the same number of electrons to balance the charge. The atomic weight minus the number of protons gives you the number of neutrons
How can the number of protons electrons and neutrons can be calculated when given atomic number and atomic mass?
For a given atomic number. Then that neutrally charged element has the same number of protons and electrons. e.g. Carbon ; Atomic Number 6, has 6 protons and 6 electrons. For a given atomic MASS , the the number of neutrons can be found, by subtracting the mass from the atomic no. e.g. Carbon ; Atomic Mass 12, has 12 - 6 = 6 neutrons. Most elements can exhibit different atomic masses , known as ISOTOPES. , This is when the given element has a different number of neutrons. e.g. Carbon ; atomic mass 13 , has 13 - 6 = 7 neutrons , described as Carbon -13 or C-13 Similarly Carbon again ; atomic mass 14, has 14 - 6 = 8 neutrons, described as Carbon-14 or C-14. A further example is hydrogen. It exhibits three isotopes. protium ; 1 proton, 0 neutrons and 1 electron Mass = 1 (H-1 or H) deuterium ; 1 proton, 1 neutron and 1 electron Mass = 2 (H-2 or D) tritium ; 1 proton 2 neutrons and 1 electrons. Mass = 3 (H-3 or T) Notice in all three isotopes the number of protons remains the same, so it is still the same element. Carbon
What does the atomic number tell you besides the number of protons in one atom of an element?
There are three main parts to an Atom. The atom comprises of protons, neutrons, and electrons. The location of each are Protons and Neutrons at the core, and Electrons in the shell **oribits around the core.** Protons and Neutrons are equal in amount unless the atom/element is an isotope.
