Chemistry Ch. 4 - Elements, Atoms, and Ions

According to the textbook, how many elements are there?

• 88

• 115

• 27

• 100

How many elements are found in nature?

• 27

• 115

• 88

• 37

How many elements were created in a laboratory?

• 27

• 88

• 37

• 22

Many names of elements are derived from...

• German

• Latin

• Greek

• French

Some elements are named after

• Plants

• The places where they were discovered

• Famous Scientists

• Famous Authors

The philosopher who came up with the idea of Atomos, or what we know today as atoms.

• Lao Tzu

• Democritus

• Pythagoras

• Ibn Sina

The scientist who thought that each compound will always have a definite ratio of atoms

• William Thomson

• J.J. Thomson

• Joseph Proust

• Ernest Rutherford

A given compound always contains elements in exactly the same proportion by mass

• Law of Conservation of Mass

• Law of Constant Composition

• Dalton's Atomic Theory

• Newton's 2nd Law of Motion

States that ...

1) elements are composed of atoms.

2) atoms of same element are identical, but differ from other elements.

3) elements can mix together

4) atoms only change when mixed with other elements

• Gold Foil Experiment

• Plum Pudding Model

• Dalton's Atomic Theory

• Hitchhiker's Guide to the Galaxy

Initially, scientists thought that atoms were...

• Solid

• Liquid

• Gaseous

• A delicious dessert