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☆☆☆☆☆Cards in this guide (8)
How do you know that a bond between magnesium and chlorine will be ionic
The difference in electronegativity between the two atoms is above 1.7, Magnesium is a metal, and chlorine is a nonmetal.
Maxwell a Russian scientist created an early periodic table of elements
false
Atoms with a low ionization energy hold tight to their outer valence electrons
No; the phrase given characterizes high rather than low ionization.
Polyatomic ions always carry a positive charge
false
Who listed the elements in a table accourding to their atomic masses
Mandeleev who predicted periodic table.
Which one of the following is a common acid soap aspirin antacid and washing soda
Aspirin
Which one of the following is a balanced equation
2NH3(g) + 3Mg(s) —> 3H2(g) + Mg3N2(s)
The change that takes place when two or more substances what to form new substances is called a chemical reaction
(Apex) interact
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