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63 terms

chem 7

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an electron in the highest occupied energy level of an atom
valence electron
atoms react so as to acquire the stable electron structure of noble gas
octet rule
an anion of chlorine or other halogen
halide ion
the force of attraction binding oppositely charged ions together
ionic bond
the attraction of valence electrons for metal ions
metallic bond
How many valence electrons are in an atom of phosphorus?
5
How many valence electrons are in an atom of magnesium?
2
How many valence electrons does a helium atom have?
2
How many valence electrons are in a silicon atom?
4
What is the name given to the electrons in the highest occupied energy level of an atom?
valence electrons
How does calcium obey the octet rule when reacting to form compounds?
It gives up electrons
What is the electron configuration of the calcium ion?
1s 2s 2p 3s 3p
What is the electron configuration of the gallium ion?
1s 2s 2p 3s 3p 3d
What is the charge on the strontium ion?
2 +
The octet rule states that, in chemical compounds, atoms tend to have ____.
the electron configuration of a noble gas
How many electrons does silver have to give up in order to achieve a pseudo-noble-gas electron configuration?
1
How many electrons does barium have to give up to achieve a noble-gas electron configuration?
2
What is the formula of the ion formed when potassium achieves noble-gas electron configuration?
K +
Which of the following elements does NOT form an ion with a charge of 1+ ?
fluorine
What is the formula of the ion formed when cadmium achieves a pseudo-noble-gas electron configuration?
Cd 2+
How many electrons does nitrogen gain in order to achieve a noble-gas electron configuration?
3
What is the formula of the ion formed when phosphorus achieves a noble-gas electron configuration?
P 3-
How does oxygen obey the octet rule when reacting to form compounds?
it gains electrons
The electron configuration of a fluoride ion, F , is ____.
the same as that of a neon atom
What is the charge on the cation in the ionic compound sodium sulfide?
1 +
Which of the following occurs in an ionic bond?
Oppositely charged ions attract.
A compound held together by ionic bonds is called a ____.
salt
What is the formula unit of sodium nitride?
Na3N
What is the formula unit of aluminum oxide?
Al2O3
What is the name of the ionic compound formed from lithium and bromine?
lithium bromide
What is the formula for sodium sulfate?
Na2 SO4
What is the formula for potassium sulfide?
K 2S
Which of the following compounds has the formula KNO 3?
potassium nitrate
a depiction of balance electrons around the symbol of an element
electron dot notation
the number of ions of opposite charge surrounding each ion in a crystal
coordination number
what is the maximum charge an ion is likely to have?
4
which of the following ions has a pseudo- noble gas electron configuration?
cu+
what is the formula of the ion formed when tin achieves a stable electron configuration?
Sn4-
which of the following is a pseudo- noble-gas configuration?
1s2 2s2 2p6 3s2 3p6
how many electrons does nitrogen gain in order to achieve a noble-gas configuration?
3
what is the electron config of the oxide ion(o2-)?
1s2 2s2 2p6
what is the electron config of iodide ion?
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6
what is the net charge of the ionic compound calcium fluoride
0
which of the following is true about an ionic compound?
it is salt, it is composed of anions and cations, is held together by ionic bonds
how many valence electrons are transfered from the nitrogen atom to potassium in the formation of the compound potassium nitrate?
2
how many valence electrons are transfered from the calcium atom to iodine in the formation of the compound calcium iodide?
1
which of the following pairs of elements is most likely to form an ionic compound?
magnesium and fluorine
ionic compounds are normally found in which physical state at room temp?
solid
which of the following is true about the melting temp of potassium chloride
the melting temp is relatively high
what does the term coordination number in ionic crystals refer to
the number of oppositely charged ions surrounding a particular ion
under what conditions can potassium bromine conduct electricity?
only when melted or dissolved in water
which of the following is not a characteristic of most ionic compounds
they have low melting points
which of the following particles are free to drift in metals
electrons
what is the basis of a metallic bond?
the attraction of metal ions to mobile electrons
what characteristic of metals makes them good electrical conductors ?
they have mobile valence electrons
an ionic bond is a bond between
a cation and an anion
in an hexagonal close packed crystal every atom (except those on the surface ) has __ neighbors
8
which metallic crystal structure has a coordination number of 8
hexagonal close packing
how many valence electrons are in rubidium?
1
how many valence electrons are in bromine ?
7
what is the charge of a particle having 9 protons and 10 electrons?
1-
how many electrons does a gallium atom give up when it becomes an ion?
3
what is the coordination number of both ions in the cesium chloride crystal?
8