Ionic Compounds and Their Formulas

Ionic Compounds and Their Formulas

Assessment

Interactive Video

Chemistry, Science, Other

9th - 10th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial covers the basics of ionic compounds, focusing on Turner ionic compounds and polyatomic ions. It explains how to identify ionic compounds by the presence of metals and introduces polyatomic ions as charged molecules acting as a unit. The tutorial provides detailed instructions on writing chemical formulas, including the use of parentheses for multiple polyatomic ions. It also introduces the crisscross rule as a shortcut for balancing charges in compound formulas, with practical examples to reinforce learning.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the key factor in determining if a compound is ionic?

Presence of a halogen

Presence of a noble gas

Presence of a metal

Presence of a non-metal

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the term 'polyatomic ion' refer to?

A single atom with a charge

A group of atoms acting as a unit with a charge

A neutral molecule

A metal ion

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why are parentheses used in the formulas of Turner ionic compounds?

To show the number of atoms in a molecule

To indicate the presence of a metal

To separate different elements

To enclose polyatomic ions when there is more than one

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the formula for sodium sulfate written?

Na(SO4)2

Na2(SO4)2

Na2SO4

NaSO4

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the Roman numeral in copper(II) hydroxide indicate?

The number of hydroxide ions

The total charge of the compound

The number of copper atoms

The charge of the copper ion

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for ammonium phosphate?

(NH4)2PO4

NH4PO4

(NH4)3PO4

NH4(PO4)3

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the crisscross method used for?

Naming ionic compounds

Writing formulas for ionic compounds

Determining the charge of ions

Balancing chemical equations

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