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WorksheetsBonding: Valence Electrons Review
Total questions: 18
Worksheet time: 28mins
What are valence electrons?
The total number of electrons in an atom
The number of electrons in the outermost shell
The number of electrons in the second shell
The number of protons in the outermost shell
What are the elements (Be, Mg, Ca,...) in group 2 called?
Alkali metals
Alkaline earth metals
Halogens
Nobel Gases
Which spdf electron configuration is correct for an element with the notation: 2 - 8 - 8 - 2?
1s2 2s2 2p6 3s2 3p6 4s2
1s2 2s2 2p6 3s2 3p6 3d2
2s2 2p6 3s2 3p6 4s2
1s2 2p8 3p8 4s2
Why is 2-8-18-8-1 more stable then 2-8-18-9?
2-8-18-8-1 has more energy levels
2-8-18-8-1 has fewer electrons
2-8-18-8-1 has full shells or half-full subshells which are more stable than incomplete subshells.
2- 8-18-8-1 has more valence electrons
Which of the following is false about covalent bonds?
Forms by sharing electrons
Forms between 2 nonmetals
Represented by a line between atoms
Forms by transferring electrons
Which list of elements contains a metal, a metalloid, and a nonmetal?
Ag, Si, I2
Ge, As, Ne
K, Cu, Br2
S, Cl2 , Ar
The elements on the Periodic Table are arranged in order of increasing...
mass number
atomic number
number of isotopes
number of valence electrons
Which elements have the most similar chemical properties?
boron and carbon
oxygen and sulfur
aluminum and bromine
argon and silicon
An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity?
carbon
fluorine
nitrogen
oxygen
How many pairs of electrons are shared between the nitrogen atoms in a molecule of N2?
1
2
3
6
Elements that have atoms with stable valence electron configurations in the ground state are
Group 1
Group 2
Group 17
Group 18
Which Group 15 element exists as diatomic molecules at STP?
phosphorus
nitrogen
bismuth
hydrogen
Which diagram below shows the correct Lewis electron-dot diagram for a molecule PCl3?
What is the correct name for PCl3?
Diphosphorous trichloride
Phosphorous Dichloride
Phosphorus Trichlorine
Phosphorous Trichloride
Which statement is FALSE about Lewis dot diagrams?
Lewis dot diagrams show how many electrons are in each energy level
Lewis dot diagrams show only the valence electrons
Lewis dot diagrams show how atoms bond to fulfill the Octet Rule
Lewis dot diagrams use lines to represent shared electrons
Which statement is FALSE about nonpolar covalent bonds?
Electronegativity Difference below 0.4
Contained in all diatomic molecules
Shares electrons equally
Shares electrons unequally
Which statement is FALSE about the Lewis dot diagram in the picture?
Each line represents 2 shared electrons
Each line represents the bond between atoms
Nitrogen requires 3 covalent bonds
There are 14 valence electrons total being shared
Which statement about the Lewis structure in the picture is FALSE?
HBr forms a polar covalent bond
HBr shares electrons equally
HBr is called Hydrogen Monobromide
HBr is more stable as a molecule then individual atoms
