chapter 3 formative assessment part i€¦ · balance in experiment slide 1. 26.49 g question 17...

Chapter 3 Formative AssessmentPart I

Organized elements into the first periodic table according to increasing atomic mass.

Question 1

Changed the first periodic table by ordering the elements by atomic number.

Question 2

Organized the inner transition elements into the Lanthanide Series and the Actinide Series.

Question 3

What were the 16th century alchemists trying to do?

Question 4

Paraclesus thought that there were 3 elements. What are they?

Question 5

Brandt used urine to discover what element?

Question 6

What two elements did Robert Boyle mix in order to create fire?

Question 7

Phlogiston was an idea that explained how fire came out of materials when they burned. The idea of phlogiston was nick name the _________ ___________ because it led people down the wrong road for a long time.

Question 8

Henry Cavendish discovered what element?

Question 9

In the mid 1700’s there were three airs. What were they?

Question 10

Joseph Priestley worked with what gas?

Question 11

Lavoisier worked with what element, which eventually disproved the idea of phlogiston?

Question 12

Lavoisier defined an element as: _______________

Question 13

Humphrey Davy broke potash down into what very reactive element?

Question 14

At the time of Davy’s death, how many elements were known?

Question 15

Experimental Question

The mass of an empty crucible is recorded using an electronic balance.

23.11 g

Experiment Slide 1

A small piece of magnesium ribbon is cut off a roll of magnesium ribbon, and it is placed into the crucible.

Experiment Slide 2

The mass of the crucible and piece of magnesium are recorded together using an electronic balance. Determine the mass of the piece of magnesium ribbon. Subtract this balance value from the value of the balance in experiment slide 1.

25.15 g

Question 16 Experiment Slide 3

The crucible is then heating in air until the magnesium burns. The product is magnesium oxide.

Experiment Slide 4

The mass of the product, magnesium oxide, plus the crucible mass are recorded once the crucible cools. Determine the mass of the magnesium oxide. Subtract this balance value from the value of the balance in experiment slide 1.

26.49 g

Question 17 Experiment Slide 5

Magnesium oxide is a white powder. Using the data from the lab, calculate the percent magnesium in the product. Take the answer from experiment slide 3 and divide it by the answer to the experiment slide 5 and then multiply it by 100. Now determine the percent oxygen in the product. Subtract the percent magnesium from 100.

Question 18

Experiment Slide 6

This experiment is an example of what law in chemistry?

Question 19

What is the law that states that matter is not created or destroyed in a normal chemical reaction?

Question 20