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Chemistry Unit 3 Review
Terms in this set (40)
How many valence electrons are in an atom of phosphorous.
How many valence electrons are in an atom of magnesium.
How many valence electrons does a helium atom have.
How does calcium obey the octet rule when reacting to form compounds?
It gives up electrons
What is the charge on the strontium ion?
How many electrons does barium have to give up to give up to achieve a noble-gas electron Configuration?
Which of the following elements forms an ion with a 1 - charge?
How does oxygen obey the octet rule when reacting to form compounds?
it gains electrons
Which of the following occurs in an ionic bond?
Oppositely charged ions attract
Which of the following is true about an ionic compound?
It is composed of anions and cations and yet it is electrically neutral
Alloys are important because
their properties are often superior to those of their component elements
Which of the following pairs of elements is most likely to form an ionic compound?
magnesium and fluorine
Ionic compounds are normally in which physical state at room temperature?
Which of the following is true about the melting temperature of potassium chloride?
The melting temperature is relatively high
Under what conditions can potassium bromide conduct electricity?
only when melted or dissolved in water
Which of the following particles are free to drift in metals?
What information does a molecular formula provide?
the number and kind of atoms present in a molecule
What is shown by the structural formula of a molecule or polyatomic ion?
the arrangement of bonded atoms
How do atoms achieve noble-gas electron configurations in single covalent bonds?
Two atoms share two electrons
Which of the following diatomic molecules is joined by a double covalent bond?
Which molecule has a single covalent bond?
The chemical formula of an ionic compound shows
the lowest whole-number ratio between ions in the ionic compound
According to VSEPR theory, molecules adjust their shapes to keep which of the following as far apart as possible?
pairs of valence electrons
What causes dipole interactions?
attraction between polar molecules
Why is hydrogen bonding only possible with hydrogen?
Hydrogen's nucleus is electron deficient when it bonds with an electronegative atom
an electron in the highest occupied energy level of an atom
atoms react so as to acquire the stable electron structure of a noble gas
a depiction of valence electrons around the symbol of an element
electron dot structure
the force of attraction binding oppositely charged ions together
the attraction of valence electrons for metal ions
a depiction of the arrangement of atoms in molecules and polyatomic ions
A covalent bond in which only one pair of electrons is shared
single covalent bond
A covalent bond in which two pairs of electrons are shared
double covalent bond
A covalent bond in which the shared electron pair comes from only one of the atoms
coordinate covalent bond
a covalent bond between two atoms of significantly different electronegativities
symmetrical bond along the axis between the two nuclei
Molecular orbital that can be occupied by two electrons of a covalent bond
shapes adjust so valence-electron pairs are as far apart as possible
attraction between polar molecules
crystal in which all the atoms are covalently bonded to each other
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