Ionic Compounds and Their Formulas

Ionic Compounds and Their Formulas

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Practice Problem

Hard

Created by

Sophia Harris

FREE Resource

The video tutorial explains how to write the formula for magnesium phosphide, an ionic compound. It begins by identifying magnesium and phosphorus on the periodic table and noting their charges. The tutorial then demonstrates the crisscross method to balance these charges, ensuring the net charge is zero. Finally, the video verifies the formula and concludes with a summary of the process.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of compound is formed between magnesium and phosphorus?

Ionic compound

Metallic compound

Molecular compound

Covalent compound

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the symbol for magnesium?

Mg

Ma

Mn

M

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the periodic table organized that helps in writing formulas?

By alphabetical order

By atomic mass

By charge

By atomic number

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the ionic charge of magnesium?

0

3+

2+

1+

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the ionic charge of phosphorus in magnesium phosphide?

3-

0

2-

1-

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What method is used to balance the charges in magnesium phosphide?

Cross-multiplication method

Crisscross method

Substitution method

Addition method

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the result of applying the crisscross method to magnesium and phosphorus?

MgP

Mg3P2

Mg2P3

MgP2

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