Worksheet chemical bonding ionic and covalent answers part 2

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worksheet chemical bonding ionic and covalent answers part 2

WORKSHEET: Chemical Bonding - Ionic & Covalent! REMEMBER. PART 1: Determine if the elements in the following compounds are metals or non-metals.

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In ordinary chemical reactions, the nucleus of each atom and thus the identity of the element remains unchanged. Electrons, however, can be added to atoms by transfer from other atoms, lost by transfer to other atoms, or shared with other atoms. The transfer and sharing of electrons among atoms govern the chemistry of the elements. During the formation of some compounds, atoms gain or lose electrons, and form electrically charged particles called ions Figure 1. You can use the periodic table to predict whether an atom will form an anion or a cation, and you can often predict the charge of the resulting ion.

In ionic compounds, electrons are transferred between atoms of different elements to form ions. But this is not the only way that compounds can be formed. Atoms can also make chemical bonds by sharing electrons equally between each other. Such bonds are called covalent bonds. Covalent bonds are formed between two atoms when both have similar tendencies to attract electrons to themselves i. For example, two hydrogen atoms bond covalently to form an H 2 molecule; each hydrogen atom in the H 2 molecule has two electrons stabilizing it, giving each atom the same number of valence electrons as the noble gas He. Compounds that contain covalent bonds exhibit different physical properties than ionic compounds.


7.2 Covalent Bonding




Worksheet - Drawing Ionic & Covalent Bond Diagrams, Part 2




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