Select the correct electron-dot formulas. You can refer to the periodic table if necessary. Check all that apply.
B, Ca, Na, C, F, Ne
answer
To draw the electron-dot formula, place the symbol of the atom at the center. The electrons are drawn in a clockwise manner starting on the right. The next electron is drawn underneath the symbol, and then on the left side. Finally, an electron is drawn above the symbol.
Although this is generally the order in which electrons are drawn, it is not the absolute method.
question
Draw the electron-dot formula for the element sulfur.
answer
Sulfur belongs to group 16 of the periodic table, so it has six valence electrons.
question
Having eight valence electrons is very stable and is called an octet.
answer
True
question
Which Lewis structure below correctly represents the compound formed between magnesium and sulfur?
answer
Mg+2 [: S..?? :]?2
question
Determine the number of bonding groups for OF2.
answer
n=2
question
Determine the number of lone pairs around the central atom for OF2.
answer
n=2
question
Determine the number of bonding groups for NF3.
answer
n=3
question
Determine the number of lone pairs around the central atom for NF3.
answer
n=1
question
Determine the number of bonding groups for CS2.
answer
n=2
question
Determine the number of lone pairs around the central atom for CS2.
answer
n=0
question
Determine the number of bonding groups for CH4.
answer
n=4
question
Determine the number of lone pairs around the central atom for CH4.
answer
n=0
question
Determine the molecular geometry of each of the following molecules.
CBr4
H2CO
CS2
BH3
