how many protons and electrons are present in mg?
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So... for the element of MAGNESIUM, you already know that the atomic number tells you the number of electrons. That means there are 12 electrons in a magnesium atom.
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Mass number This tells us that sodium has 11 protons and because it is neutral it has 11 electrons. The mass number of an element tells us the number of protons AND neutrons in an atom (the two particles that have a measurable mass).
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A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Under standard conditions, uranium is a hard silvery metal.
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Ag+ = 47 electrons - 1 electron = 46 electrons. Finally: 47 protons , 61 neutrons and 46 electrons.
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Aluminum is in the fifth column and therefore has 5 electrons in its outermost shell. It would tend to lose three electrons and form a +3 ion. Magnesium is in the second column and therefore has 2 electrons in its outermost shell. It would tend to lose two electrons and form a +2 ion.
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Answer and Explanation: This compound contains one magnesium atom, two nitrogen atoms and six oxygen atoms.
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If the atomic number is 17, there must be 17 protons and 17 electrons. Starting from the lowest level, we add electrons to each higher level until we have reached 17 electrons. The electron configuration becomes 1s22s22p63s23p5 .
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Answer and Explanation: Magnesium has 2 valence electrons. For the main group elements (not transition metals), the group number tells us the number of valence electrons in...
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Mg most commonly forms a 2+ ion. This is because Mg has two valence electrons and it would like to get rid of those two ions to obey the octet rule. Fluorine has seven valence electrons and as such, usually forms the F– ion because it gains one electron to satisfy the octet rule.
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So sodium has 11 protons and 11 electrons. The mass number is 23. The number of neutrons = mass number – atomic number. The number of neutrons = 23 – 11 = 12.
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The L shell only holds eight electrons. The M shell only holds eight electrons. The M shell can actually hold up to 18 electrons as you move to higher atomic numbers. The maximum number of electrons you will find in any shell is 32.
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Aluminum is in the fifth column and therefore has 5 electrons in its outermost shell. It would tend to lose three electrons and form a +3 ion. Magnesium is in the second column and therefore has 2 electrons in its outermost shell.
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50 protons, 50 electrons, 75 neutrons 120 neutrons, 50 protons, 75 electrons b.
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Atoms must have equal numbers of protons and electrons. In our example, an atom of krypton must contain 36 electrons since it contains 36 protons.
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1. There are 4 protons, 5 neutrons, and 4 electrons. This is a neutral beryllium atom.
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12 protons, 12 neutrons, 10 electrons This is a magnesium Ion. There are 12 protons from the magnesium atom. There are 10 electrons because 12-2 = 10. There are 12 neutrons because 24-12 = 12.
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Atomic Number of Radon is 86. Hence there are 86 electrons and 86 protons in a Radon atom. Atomic Number of Magnesium is 12. Hence there are 12 electrons and 12 protons in a Magnesium atom.