25 is the number of protons and neutrons added together. The atomic number of Mg is 12 which is the number of protons. So 25 - 12 = 13 neutrons.
The "25" is the mass number, which is the sum of the number of neutrons and protons. We don't know how many neutrons there are, but we do know how many protons magnesium has. The atomic number of an element is the same as the number of protons, so locating a Periodic Table, magnesium is number 12, which means 12 protons. If mass number = number of protons + number of neutrons, then number of neutrons = mass number - number of protons (or atomic number). So 25 - 12 = 13 neutrons in 25Mg.
25 is the number of protons and neutrons added together. The atomic number of Mg is 12 which is the number of protons. So 25 - 12 = 13 neutrons.
Mg has 12 protons. So, the number of neutrons = 25 -12 = 13.
Q.E.D.
12 electrons, 12 protons, and 25 neutrons.
Number of neutrons = Mass number - Number of protons = 25 - 12 = 13 neutrons
The mass number of the isotope 25Mg is the nucleon number or sum of number of protons and neutrons. All magnesium atoms have 12 protons. Therefore number of neutrons in 25Mg = 25 - 12 = 13
12
A stable magnesium atom has 12, 13 or 14 neutrons. The atom with 12 neutrons is the most common one.
the best answer is 12
The number of protons (p+) in the nuclei of an element's atoms is the atomic number of the element. In this case, the atomic number of magnesium is 12. In a neutral atom, the number of electrons (e-) equals the number of protons. So all neutral magnesium atoms have 12 protons and 12 electrons. Isotopes of an element differ in the number of neutrons (n0).There are three stable isotopes of magnesium (Mg) identified by their mass numbers; magnesium-24, magnesium-25, and magnesium-26. The mass number is the sum of protons and neutrons in the nucleus of an atom. To determine the number of neutrons, subtract the atomic number from the mass number. (mass number - atomic number = no. of neutrons)Magnesium-24: 24 - 12 = 12; An atom of Mg-24 has 12 p+, 12 e-, and 12 n0.Magnesium-25: 25 - 12 = 13; An atom of Mg-25 has 12 p+, 12 e-, and 13 n0.Magnesium-26: 26 - 12 = 14; An atom of Mg-26 has 12 p+, 12 e-, and 14 n0.
Magnesium, an element with 12 protons, does not have a fixed number of neutrons. It exists as many isotopes (differing versions of the same element with the same number of protons, but a different number of neutrons), three of which are Mg-24, Mg-25, and Mg-26. [Atomic symbol-Atomic mass] To find the number of neutrons, take the atomic number from the atomic mass: for example, 26 - 12 = 14. This means Mg-26 has 14 neutrons. However, to answer your question, the most common isotope of Magnesium is Mg-24. This is the case for most elements up to and including atomic number 20; the number of neutrons equals the number of protons. So; the most common isotope of Magnesium, Mg-24, with a relative abundance of about 79%, has 24 - 12 = 12 neutrons.
This would be magnesium, based on the number of protons. Since the protons is equal to the number of electrons it is a neutral atom. Given the number of protons in the atom, the isotope would be magnesium-26.
13 neutrons
13 neutrons. Atomic number of Mg is 12 equal to the number of protons. So 25-12=13.
The "25" is the mass number, which is the sum of the number of neutrons and protons. We don't know how many neutrons there are, but we do know how many protons magnesium has. The atomic number of an element is the same as the number of protons, so locating a Periodic Table, magnesium is number 12, which means 12 protons. If mass number = number of protons + number of neutrons, then number of neutrons = mass number - number of protons (or atomic number). So 25 - 12 = 13 neutrons in 25Mg.
12 neutrons
The atomic number of magnesium is 12. So there are 12 protons
A stable magnesium atom has 12, 13 or 14 neutrons. The atom with 12 neutrons is the most common one.
Number of neutrons = Atomic weight - Atomic number (number of prtons) The atomic number of magnesium is 12; the standard atomic weight is circa 24,3. But magnesium has many isotopes (three are natural) and the number of neutrons is variable in the isotopes - from 7 to 28. The most common natural isotope, 24Mg, has 12 neutrons.
Any atom of magnesium will have 12 protons.Neutral atoms of Mg-24 will have 12 neutrons and 12 electrons. Mg-25 has 13 neutrons and Mg-26 has 14 neutrons. A magnesium ion will have either 10 or 11 electrons.
Any atom of magnesium will have 12 protons.Neutral atoms of Mg-24 will have 12 neutrons and 12 electrons. Mg-25 has 13 neutrons and Mg-26 has 14 neutrons. A magnesium ion will have either 10 or 11 electrons.
the best answer is 12
There are many different isotopes of magnesium but: 24Mg is stable with 12 neutrons 25Mg is stable with 13 neutrons 26Mg is stable with 14 neutrons
The number of protons (p+) in the nuclei of an element's atoms is the atomic number of the element. In this case, the atomic number of magnesium is 12. In a neutral atom, the number of electrons (e-) equals the number of protons. So all neutral magnesium atoms have 12 protons and 12 electrons. Isotopes of an element differ in the number of neutrons (n0).There are three stable isotopes of magnesium (Mg) identified by their mass numbers; magnesium-24, magnesium-25, and magnesium-26. The mass number is the sum of protons and neutrons in the nucleus of an atom. To determine the number of neutrons, subtract the atomic number from the mass number. (mass number - atomic number = no. of neutrons)Magnesium-24: 24 - 12 = 12; An atom of Mg-24 has 12 p+, 12 e-, and 12 n0.Magnesium-25: 25 - 12 = 13; An atom of Mg-25 has 12 p+, 12 e-, and 13 n0.Magnesium-26: 26 - 12 = 14; An atom of Mg-26 has 12 p+, 12 e-, and 14 n0.