✅ 9th Grade Other: Lewis Dot Structure, Polarity-Nonpolarity, Naming Compounds, and Intermolecular Forces Quiz
✅ 9th Grade Other: Lewis Dot Structure, Polarity-Nonpolarity, Naming Compounds, and Intermolecular Forces Quiz
How many valence electrons does a neutral atom of Oxygen (O) have?
A) 2B) 4
C) 6
D) 8
Which of the following is a correct name for the ionic compound $NaCl$?
A) Sodium ChlorineB) Sodium Chloride
C) Monosodium Monochloride
D) Sodium(I) Chloride
Which element would typically form an ion with a $+1$ charge?
A) Chlorine (Cl)B) Oxygen (O)
C) Potassium (K)
D) Carbon (C)
A molecule that has an uneven distribution of electron density, resulting in a slight positive and a slight negative end, is described as:
A) NonpolarB) Ionic
C) Metallic
D) Polar
What is the chemical formula for calcium bromide?
A) $CaBr$B) $Ca_2Br$
C) $CaBr_2$
D) $Ca_2Br_2$
Which type of intermolecular force is present in ALL molecules, regardless of their polarity?
A) Hydrogen bondingB) Dipole-dipole forces
C) London dispersion forces
D) Ion-dipole forces
Consider the Lewis dot structure for a water molecule ($H_2O$). How many lone pairs of electrons are on the central oxygen atom?
A) 0B) 1
C) 2
D) 3
Which of the following molecules is expected to be polar?
A) $CO_2$ (Carbon dioxide)B) $CH_4$ (Methane)
C) $H_2O$ (Water)
D) $Cl_2$ (Chlorine gas)
What is the correct name for the covalent compound $N_2O_4$?
A) Dinitrogen TetroxideB) Nitrogen Oxide
C) Dinitrogen Oxide
D) Nitrogen Tetroxide
Which intermolecular force is primarily responsible for the relatively high boiling point of water compared to other molecules of similar size, such as methane ($CH_4$)?
A) London dispersion forcesB) Dipole-dipole forces
C) Hydrogen bonding
D) Ion-dipole forces
Which of the following molecules has a trigonal planar electron geometry and a trigonal planar molecular geometry?
A) $NH_3$B) $H_2O$
C) $CH_4$
D) $BF_3$
A molecule has a central atom bonded to three identical atoms, with no lone pairs on the central atom. What is the most likely molecular geometry and will the molecule be polar or nonpolar?
A) Trigonal pyramidal, polarB) Trigonal planar, nonpolar
C) Tetrahedral, nonpolar
D) Bent, polar
Arrange the following substances in order of increasing boiling point: $CH_4$, $NH_3$, $H_2O$.
A) $CH_4 < NH_3 < H_2O$B) $H_2O < NH_3 < CH_4$
C) $NH_3 < CH_4 < H_2O$
D) $CH_4 < H_2O < NH_3$
What is the correct name for the compound $Fe_2(SO_4)_3$?
A) Iron SulfateB) Iron(II) Sulfate
C) Diiron Trisulfate
D) Iron(III) Sulfate
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