Honors Chem Final
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