multiple choice
What is the chemical formula for Bromate?
A)BrO2-1
B)BO3-3
C)BrO3-1
D)BrO-1
C)BrO3-1
TRUE OR FALSE : you may change the subscripts that are inherent to the polyatomic ion , even if the subscript
ZnS
zinc sulfide
Magnesium sulfate
MgSO4
What are cations?
a positively charged ion that forms when an atom or molecule loses one or more electrons
What is the ion C5H6N+1?
A)pyridinium
B)methylammonium
C)pyrylium
d)benzoate
A)pyridinium
A polyatomic ion consists of only a single atom with a positive or negative charge.
FALSE.
RaCrO4
Radium chromate
K₂CO₂
What is an anion?
an atom or molecule that has a net negative charge.
Which of the following is a Cation?
A)H2PO4-1
B)As2O7-4
C)CH3NH3+1
D)Cr2O7-2
C)CH3NH3+1
The hydroxide ion carries a -2 charge.
FALSE.
K2C4H4O6
potassium tartrate
Calcium nitrate
Ca(NO3)2
What is a monatomic ion?
An ion consisting of a single atom that has gained or lost electrons.
Which of the following is a Anion with a -2 charge and is made up of 4 carbons?
A)Citrate
B)Oxalate
C)Dichromate
D)Tartrate
D)Tartrate
A polyatomic ion is a group of atoms covalently bonded together that carries an overall neutral charge.
TRUE.
Mg(CHO2)2
magnesium formate
Stontium hydrogen sulfate
Sr(HSO4)2
What is a polyatomic ion?
A tightly bound group of two or more atoms that behaves as a single unit and carries a net electrical charge.
How would you correctly bond together Selinium and pyrylium?
A)(C5H6N)2Se
B)Se(C5H6N)2
C)(C5H5O)2Se
D)Se(C5H5O)2
C)(C5H5O)2Se
When writing a chemical formula for an ionic compound containing multiple polyatomic ions, you use parentheses around the ion if the subscript outside is greater than 1.
TRUE.
(N2H5)3Bi
hydrazinum bismuthide
methylammonium telluride
(CH3NH3)2Te
Explain what the criss-cross method is and how it works.
The criss-cross method is a fast way of predicting the chemical formula of a ionic compounds by switching the numbers of the charges of the cation and anion to become the subscripts of the opposite ion, ensuring a neutral compound.