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- 1. Multiple ChoiceAccording to the octet rule most elements need _______ valence electrons.28618
- 2. Multiple ChoiceHydrogen needs _____ electrons in its valence shell to be stable.4682
- 3. Multiple Choice
What is the correct formula for this molecule?NHN3HNH3NH4 - 4. Multiple ChoiceHow many covalent bonds does carbon need to form in order to have a full octet?2345
- 5. Multiple Choice
What is a double bond?
a bond between two atoms
one pair of electrons shared between two atoms
two pairs of electrons shared between two atoms
three pairs of electrons shared between two atoms
- 6. Multiple ChoiceCovalent compoundsShare electronstransfer electronscontain a sea of electronsconduct electricity
- 7. Multiple Choice
NH3 has how many lone pairs?
0
1
2
3
- 8. Multiple ChoiceHow many valence electrons does nitrogen have?3251
- 9. Multiple Choice
What is it called if there are three-pairs of electrons being shared?
Triple bond
Trigonal bond
Tri-bond
Three bonds
- 10. Multiple ChoiceWhat two types of atoms make a covalent bond?2 Nonmetals1 Nonmetal & 1 Metal2 Metals2 Noble Gases
- 11. Multiple ChoiceWhat is a diatomic element?a metal bonded with a nonmetal2 or more nonmetals bonded together2 or more metals bonded together2 atoms of the same element bonded together
- 12. Multiple ChoiceThe number of bonds an element will form in a covalent compound will be equal tothe number of valence electronseight electronsthe number of electrons needed to reach an octetthe group number
- 13. Multiple Choice
Which element below is not diatomic?
hydrogen
oxygen
nitrogen
sulfur
- 14. Multiple Choice
How many valence electrons are in oxygen, O?
2
7
6
1
- 15. Multiple Choice
Which of the following elements needs to bond 3 times?
Oxygen, O
Phosphorous, P
Fluorine, F
Silicon, Si
- 16. Multiple Choice
Which of the following is a Diatomic Molecule?
K2
C2
S2
N2
- 17. Multiple Choice
Which of the following molecules have a shape similar to the shape shown?
Silicon dioxide, SiO2
Carbon dioxide, CO2
Water, H2O
Ammonia, NH3
- 18. Multiple Choice
Which of these would be covalently bonded?
Sodium, Na and potassium, K
Magnesium, Mg and oxygen, O
Fluorine, F and chlorine, Cl
Helium, He and argon, Ar
- 19. Multiple Choice
Many _____ exist as diatomic molecules.
alkali metals
semi-metals
transition metals
non-metals
- 20. Multiple Choice
Which of these is not a covalent molecule?
K2O
CO2
HCl
CH4
- Answer choicesTagsAnswer choicesTags