Honors Chem Final

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How do anions form

By gaining electrons

Whats the name and symbol for when fluorine gains one electron

Fluorine ion F-1

Ionic bond

Formed when one or more electrons are transferred from one atom to another

What properties characterize ionic compounds

Most ionic compounds are crystalline solids at room temperature, have high melting points. Ionic compounds can conduct an electric current when melted or dissolved in water, good insulators, hard & brittle

Whats the name and symbol for when potassium loses an electron

Potassium Ion, K+

Whats the name and symbol for when a zinc atom loses two electrons

Zinc (II) Ion, Zinc2+

How do cations form

an atom loses one or more electrons

How can you determine the number of valance electrons in an atom of a representative element

by looking at its group number

lewis dot structure

diagram of a molecule using dots to represent valence electrons

How many electrons does fluorine gain or lose

gain 1

How many electrons does oxygen gain or lose

gain 2

How many electrons does aluminum gain or lose

lose 3

How many electrons does calcium gain or lose

loses 2

Atoms of which elements tend to lose electrons?

metals

Electrical charge of an ionic compound

neutral

Atoms of which elements tend to gain electrons?

nonmetals

How can you represent the composition of an ionic compound?

whole number ratios

How many valence electrons are in an atom of potassium

1

How many valence electrons does magnesium have

2

How many valence electrons are in an atom of carbon

4

How many valence electrons does oxygen have

6


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