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100
What are the valence electrons of an atom?
The electrons in the highest occupied energy level. Also, the electrons on the outermost shell.
100
Daily Triple
The electron dot structure for aluminum shows three dots spaced around the chemical symbol for aluminum (Al). What do the three dots represent?
The number of valence electrons in the aluminum atom
100
An ionic bond forms when which event occurs?
One atom transfers one or more electrons to another atom, changing both atoms into ions.
100
An ionic bond may form between
one cation and one anion.
100
Subtract 100 points from this team.
Sorry bro.
200
How do cations form?
Atoms lose one or more valence electrons.
200
What is an alloy?
Mixture of metals.
200
What is a crystal?
A geometric pattern that repeats itself.
200
Why do ionic crystals shatter when exposed to a hard force?
The geometric arrangement becomes shifted, forcing the positive and negative charges of the ions to repel each other.
200
Why do ionic compounds conduct electric current when they are melted or dissolved in water?
The ions are free to move.
300
How do electrons move through a length of metallic wire when an electric current passes through the wire?
Electrons move from one end of the wire to the other.
300
How many valence electrons are in each magnesium atom?
2
300
How do anions form?
Atoms gain one or more valence electrons.
300
Daily Double
Why do metals tend to be good conductors of electric current?
Valence electrons of metals are very mobile and can carry electric current through the metal.
300
Identify the charge of the ion formed when a potassium atom loses one electron.
+1
400
Daily Double
Which electron dot formula correctly illustrates the compound magnesium fluoride?
A.
B.
C.
D.
A
400
Chlorine atoms typically gain one electron each to become chloride ions of charge 1−. In the electron dot structure of the chloride ion, how many dots are placed around the chemical symbol for chlorine, Cl?
7
400
A fluorine atom has 9 electrons, of which 7 are valence electrons. A student is drawing the electron dot structure of the fluorine anion, which has a charge of 1−. How many dots should she draw around the letter F, which is the chemical symbol for fluorine?
8
400
What type of bond forms when one or more electrons transfer from one atom to another atom, changing both atoms into ions?
Ionic.
400
How many valence electrons are in each potassium atom?
1
500
Based on data from the periodic table, a student concluded that calcium sulfide is an ionic compound. Which drawing should the student use to communicate this conclusion?
A.
B.
C.
D.
C
500
Daily Double
The electron configuration of phosphorus is written as 1s22s22p63s23p3.
How many valence electrons does a phosphorus atom have?
5
500
Which electron dot formula correctly illustrates an ionic bond?
A.
B.
C.
D.
D
500
PUNISHMENT BOX
Sorry guy.
500
BONUS BOX
Yea man. Keep it up.