Lewis Dot Symbols
Q: What do Lewis dot symbols represent?
Q: What is the charge of nitrate, NO3?
A: -1
Q: What happens to electronegativity as you move up and to the right on the periodic table?
Q: What is the name of Na2SO4
A: MgCl2
Q: How many valence electrons does Carbon (C) have?
A: SO42-
Q: Which bond is more polar: C-H or O-H
A: O-H
Q: Name Ca(OH)2
A: Calcium Hydroxide
Q: Write the chemical formula for Calcium Phosphate
A: Ca3(PO4)2
Q: In a Lewis stucture, why is hydrogen never the central atom?
A: It can only form 1 bond
Q: Which polyatomic ion is NH4+
A: Ammonium.
Q: If the electronegativity difference=1.6, is the bond more likely nonpolar covalent, polar covalent or ionic
A: polar covalent
Q: NH4Cl
A: Ammonium Chloride
Q: Write the formula for aluminum sulfate.
A: Al2(SO4)3
Q: How many total valence electrons are in NH3
Q: What is the name of CO32-
A: Carbonate.
Q: Which bond is most likely ionic: Na-Cl, C-Cl, or H-Cl
A: Na-Cl
Q: Name Fe2(SO4)3
Q: Write the formula for ammonium carbonate.
A: (NH4)2(CO3)
Q: A molecule has 18 total valence electrons and the central atom forms 3 single bonds. How many lone pairs are on the central atom
A: 1 lone pair (3 bonds = 6 electrons, leaving 2 electrons for a lone pair on central after octet fill)
Q: What is the difference between nitrate and nitrite?
A: Nitrate has 3 oxygens (NO3-), nitrite has 2 oxygens (NO2-)
Q: A molecule has polar bonds but is still nonpolar overall. What must be true about the molecule?
The molecule is symmetrical so dipoles cancel out.
Q: Name Cu(NO3)2
Q: What is the formula for Iron(III) Nitrate
Fe(NO3)3