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When a neutral atom loses a valence electron, it loses a negative charge. It becomes a positive ion. When a neutral atom gains an electron it gains a negative charge. It becomes a negative ion.
How do ions form?
Write the symbols for the ions that form when potassium and iodine react to form the ionic compound potassium iodide
Because potassium is 1+ and iodine is 1- making it electrically neutral
Why is potassium iodide electrically neutral?
numbers written below the line that tell how many atoms of a given type are in a compound.
To write a formula for an ionic compound, write the symbol of the positive ion and then the symbol of the negative ion. Add the subscripts that are needed to balance the charges. For an ionic compound, the name of the positive ion comes first, followed by the name of the negative ion.
How are the formulas and names of ionic compounds written?
The attractions between the shared electrons and the protons in the nucleus of each atom hold the atoms together in a covalent bond
How are atoms held together in a covalent bond?
States that atoms lose, gain or share electrons in order to acquire a full set of eight valence electrons
a bond formed by the attraction between positively charged metal ions and the electrons around them
Ionic bonds typically form between charged atoms of metals and nonmetals. Covalent bonds usually form between uncharged atoms of nonmetals.
What is the difference between ionic bonds and covalent bonds?
decreases from top to bottom in a group; increases from left to right in a period
the ability of a substance to be drawn, pulled, or extruded through a small opening to produce a wire
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