Chem 101 - Week 2 - Exam 1

Simpson college Chem 101

Chemistry is the study of

Matter and energy, as well as their interactions

How do chemists see or think about the world?

As the macroscopic to the particulate / submicroscopic scale

How do chemists talk about their observations?

All of the above

How do chemists study things? Step 1:

Observations about the natural world

How do chemists study things? Step 2:

Hypothesis

How do chemists study things? Step 3:

Experiments

How do chemists study things? Step 4: (only if step 2 is right)

Law

Observations that “break” the law often

Lead to new insights

What is matter?

Anything that takes up space and has mass

What states do we find matter?

Solid, liquid, and gas (main 3)

What is interesting about solids and liquids?

Non-compressible

Matter can be recorded as what?

Pure substance and mixture

A pure substance can be?

Elements or pure compounds

What are elements?

The periodic table

How does gas apply pressure

It moves and creates a force pushing in to pushing out tension when it bounces off something

A mixture can be?

Heterogeneous and Homogeneous

An element is a pure substance that

Cannot be decomposed by chemical processes

What happens when you cut an element into a billion pieces?

Still the same element

Compounds are

Substances made up of two or more different elements that are held together by chemical bonds