Identifying Elements in Compounds

The video tutorial explains how to count the number of elements in a compound by identifying different types of atoms. It uses examples like magnesium oxide and sodium carbonate to demonstrate the process. The tutorial emphasizes the importance of recognizing elements by their capital letters and provides practice exercises with compounds like calcium sulfate. It also highlights the use of the periodic table as a reference tool.

What is the total number of elements in magnesium oxide?

• Two

• Four

• Three

• One

Which of the following is a correct way to identify an element in a compound?

• Count all letters

• Ignore capital letters

• Look for lowercase letters

• Identify capital letters

How many elements are present in sodium carbonate?

• Four

• Three

• One

• Two

In the compound calcium sulfate, which of the following is NOT an element present?

• Calcium

• Sulfur

• Hydrogen

• Oxygen

What is the correct way to split elements in a compound?

• Split at numbers

• Split at capital letters

• Split at lowercase letters

• Split at every letter

How many elements are in potassium hydroxide?

• Three

• Four

• Two

• One

Which element is represented by 'Li' in lithium nitrate?

• Lead

• Lanthanum

• Lutetium

• Lithium

What is the total number of elements in lithium nitrate?

• Four

• One

• Three

• Two

Why is it recommended to use a periodic table when counting elements in a compound?

• To identify the number of protons

• To remember that each element starts with a capital letter

• To find the atomic mass

• To calculate the molecular weight

Which of the following compounds contains three elements?

• Water

• Calcium oxide

• Sodium carbonate

• Magnesium oxide