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The ion has two electrons removed to make Mg2+. However, there are still the same number of protons in the nucleus but they have two less electrons to attract and thus pull the remaining 10 electrons closer and hence the radius is smaller.
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∙ 13y ago
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∙ 11y agoMg2+ and O2- ions are isoelectronic (they have the same number of electrons). However, magnesium has a greater number of protons than oxygen, and hence greater effective nuclear charge and larger force of attraction with the valence electrons.
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∙ 10y agoMg's atomic radius is greater than O's for two reasons. First, Mg lies to the left of O on the Periodic Table. This is an important trend for atomic radius - size decreases left to right, because additional protons in the nucleus draw the electrons closer (because of positive-negative attraction.) Second, Mg is a period below O on the periodic table. This means one extra energy level of electrons, which is comparable to another floor of a building. Mg is in period 3, which is like a 3-story building, and O is in period 2, which is like a 2-story building.
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∙ 14y agoa magnesium atom is smaller because it has a higher first ionisation energy and therefor holds its electrons more tightly .
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∙ 14y agoThe magnesium ion has a lesser amount of electrons than a regular magnesium atom, making the ion smaller than the regular atom.
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∙ 11y agobecause chlorine atom has smaller atomic radius and increasing in electronegativity .
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∙ 12y agobecause it can be
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Would you expect a chlorine ion to be smaller than a magnesium ion?
no, Cl is bigger
Does magnesium have a smaller radius than helium?
Atoms do not have a radius. A helium atom has a nucleus composed of at least two protons and maybe one or two neutrons. A magnesium atom nucleus (and every other atom on the periodic table other than hydrogen) is BIGGER than a helium nucleus. So if you look at it that way...magnesium is larger than helium
What is bigger a chlorine atom or a chlorine ion?
A chloride ion is slightly larger than a chlorine atom, because in an ion there is one more electron than proton, allowing the electron shells to expand slightly. In a chlorine atom, the number of electrons and protons is the same.
Why is lattice energy of MgF2 greater than MgCl2?
since ca2+ has a larger atomic radii compared to Mg2+ (and the same for F and CL2), the electrons are dispersed over a wider surface area and so have a lesser strength than that of magnesium. Hence, with a smaller atomic radii, Magnesium has stronger attractive forces with require more energy to be broken and therefore making it more exothermic than calcium.
Is magnesium's ionization energy higher or lower than chlorine?
ionization energies of mg is less than chlorine because chlorine requires only one electron to complete its octet so it will not prefer to loose its electron morover its electronegativity is also higher and it is of smaller size than mg so electtron removal is difficult
When an atom of chlorine forms an ionic bond with an atom of sodium does the atom of chlorine become an ion with a smaller or larger radius than the atom of chlorine?
It becomes an ion with a larger radius than the atom of chlorine
Why is Mg smaller than Cl?
Magnesium isn't smaller than chlorine, it's larger. The atomic radius for magnesium is 145 pm and the atomic radius for chlorine is 79 pm. Both magnesium and chlorine are in the third period of the periodic table. The trend for atomic radius is that the elements generally get smaller as you move from left to right across the table in the same period.
Would you expect a chlorine ion to be smaller than a magnesium ion?
no, Cl is bigger
What is the element size of bromine?
Its atom size is bigger than Chlorine but smaller than Iodine
Does chlorine atom has a smaller radius than chlorine ion?
Yes, considerably so. In general, positive ions are smaller than their neutral atoms, and negative ions are larger than their neutral atoms.
Is a sulfur atom bigger than an phosphorous atom?
The neutral atom is bigger. The ion would be smaller because in order for magnesium to become a positively charged ion, it has to give up its valence electrons, which results in the removal of the outermost energy level. So instead of having three energy levels, the ion now has only two.
Does magnesium have a smaller radius than helium?
Atoms do not have a radius. A helium atom has a nucleus composed of at least two protons and maybe one or two neutrons. A magnesium atom nucleus (and every other atom on the periodic table other than hydrogen) is BIGGER than a helium nucleus. So if you look at it that way...magnesium is larger than helium
Element M reacts with chlorine to form a compound with the formula MCl2 It is more reactive than magnesium and smaller than barium This element is?
Sr
Why fluorine is stronger oxidising agent than chlorine?
Oxidising agents gain electrons. Fluorine is a smaller atom than chlorine, so the effective pull of its nucleus is greater.
An atom of chlorine has 6 more protons than an atom of sodium How many protons does an atom of chlorine have?
Chlorine has 17 protons.
Which one has the lowest ionization energy magnesium (Mg) chlorine (C?
Chlorine is Cl, C is carbon. The first ionization energy of magnesium is less than that of chlorine.
When was our Universe smaller than an atom?
The Universe was never smaller than an atom.
