Which diagram is the correct electron dot diagram for magnesium? (Use the section of the periodic table below to help answer this question Hydrogen 1.01 3 4 Li Be Lithium 6.94 Beryllium 9.01 11 12 Sodium 22.99 19 Magnesium 24.31 3. 20 21 22 23 Ca Sc Ti Potassium 39.10 Cakium 40.08 Scandium 44.96 Titanium 47.88 Vanadium 50.94 •Mg• o •Mg •Mg

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A: A neutral atom contains equal number of protons and neutrons.

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Q: Give an example of an ionic compound that does not contain a metal.

A: ANSWER IS DISCUSSED BELOW :

Q: The formulas for several ionic compounds are shown below, with X representing an unidentified main…

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Q: O Mg3P2

A: Answer: the most ionic compound formed from the magnesium and phosphorus is Mg3P2.

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A: The formulae and chemical names are given below

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Actinides

The elements in which the extra electron tends to enter the 5f-orbitals of (n–2)th main shell are considered 5f-block elements. They are also named actinides. Actinides include 15 elements, from atomic number 89 to 103.