Chemical Compounds and Elements

The video is a review of a Unit 1 test, covering topics such as identifying elements and compounds using the periodic table, analyzing chemical formulas, and classifying substances. The teacher guides students through each question, explaining concepts like compounds, elements, and molecules, and how to count atoms in chemical formulas.

What elements are present in the chemical formula CaCO3?

• Calcium, Cobalt, Oxygen

• Carbon, Oxygen, Nitrogen

• Calcium, Carbon, Oxygen

• Calcium, Carbon, Nitrogen

Which of the following is a compound?

• Mg

• O2

• Au

• NaCl

What is the correct classification for substances in Group B?

• Solutions

• Mixtures

• Elements

• Compounds

Which of the following is classified as a compound?

• Aluminum

• Water

• Soil

• Gold

Which of the following is an element?

• CO

• Al

• NaCl

• H2O

How many total atoms are in the chemical formula NH4PO4?

• 15

• 20

• 18

• 22

In the formula H2SO4, how many oxygen atoms are present?

• 6

• 4

• 8

• 2

How many elements are present in the formula C3H7NO2?

• 3

• 4

• 5

• 6

How many oxygen atoms are in the compound AgNO3?

• 4

• 3

• 2

• 1

How many elements are present in glucose, C6H12O6?

• 5

• 4

• 3

• 2