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Physical Science Chapter 5 Review
Terms in this set (35)
the attraction between two oppositely charged ions
An atom or group of atoms that has a positive or negative charge.
A positive ion
When an atom loses an electron, it loses a negative charge and becomes this
A negative ion
when any atom gains an electron, it gains a negative charge and it becomes a what?
electrically neutral or balanced
Compounds have this characteristic
ions that are made of more than one atom
How does an ion form an atom?
the atom gains or loses electrons
what are some properties used to identify ionic compounds?
crystal shape, high melting points, and electrical conductivity
why are ions in an ionic compound attracted to each other?
because they are oppositely charged
A chemical bond formed when a pair of electrons is shared between two atoms
Ionic bonds form between what?
metals and nonmetals
covalent bonds form between what?
2 or more nonmetals
What happens in a covalent bond?
both atoms attract the two shared electrons at the same time.
when two atoms share two pairs of electrons
A compound consisting of molecules of covalently bonded atoms
a covalent bond in which atoms share electrons unequally
equal sharing of electrons and neither atom becomes charged
A naturally occurring solid that has a crystal structure and a definite chemical composition
Most minerals are compounds or elements?
gold and sulfur
Examples of minerals that are in element form
every mineral has this 3-D structure type
the stronger the chemical bonds in a mineral crystal mean what?
the harder the crystal is
what is one property of an ionic compound?
why can fluorine atoms not form a double or triple bond?
because it has 7 valence electrons
an ionic crystal splits along a face of what?
when any atom gains an electron, it becomes a what?
Are the attractions between polar molecules weaker or stronger than those between non polar molecules?
what is determined by how easily a mineral can be scratched?
Are the bonds in halite weaker or stronger than the bonds in quartz?
How does the number of valence electrons in an element affect the type and number of bonds it can form?
it determines whether an atom gains, loses, or shares electrons
how would you use the periodic table to determine what type of chemical bonds are in certain compounds?
metal to nonmetal is usually ionic, nonmetal to nonmetal is usually covalent
How is a covalent bond between 2 atoms affected when each atom attracts electrons equally
the bond is nonpolar
which atom attracts electrons most strongly?
do fluorine atoms form polar or non polar covalent bonds?
Examples of elements that form triple bonds (where three pairs of electrons are shared)
nitrogen and carbon
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