Polytatomic Ions

multiple choice

100

What is the chemical formula for Bromate?

A)BrO₂^-1

B)BO₃^-3

C)BrO₃^-1

D)BrO^-1

C)BrO₃^-1

200

What is the ion C₅H₆N^+1?

^A)pyridinium

^{B)methylammonium}

^C)pyrylium 

^d)benzoate

^A)pyridinium

300

Which of the following is a Cation?

A)H₂PO₄^-1

B)As₂O₇^-4

C)CH₃NH₃⁺¹

D)Cr₂O₇^-2

C)CH₃NH₃⁺¹

400

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

500

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

true/false

100

 TRUE OR FALSE : you may change the subscripts that are inherent to the polyatomic ion , even if the subscript

FALSE

200

A polyatomic ion consists of only a single atom with a positive or negative charge.

FALSE.

300

The hydroxide ion carries a -2 charge.

FALSE.

400

A polyatomic ion is a group of atoms covalently bonded together that carries an overall neutral charge. 

TRUE.

500

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.

formula→words

100

ZnS

zinc sulfide

200

RaCrO₄

Radium chromate

300

K₂C₄H₄O₆

potassium tartrate

400

Mg(CHO₂)₂

magnesium formate

500

(N₂H₅)₃Bi

hydrazinum bismuthide

words→formula

100

Magnesium sulfate

MgSO₄

200

potassium carbonite

K₂CO₂

300

Calcium nitrate

Ca(NO₃)₂

400

Stontium hydrogen sulfate

Sr(HSO₄)₂

500

methylammonium telluride

(CH₃NH₃)₂Te

vocabulary

100

What are cations?

a positively charged ion that forms when an atom or molecule loses one or more electrons

200

What is an anion?

an atom or molecule that has a net negative charge.

300

What is a monatomic ion?

An ion consisting of a single atom that has gained or lost electrons.

400

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.

500

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.