Early Ideas About MatterSection 4.1

Early Ideas About MatterSection 4.1

Read the following paragraph and describe what the main idea is in a least 3 sentences.

The idea that all matter is made up of tiny, indivisible particles, or atoms, is believed to have originated with the Greek philosopher Democritus. He held that, in addition to being too small to be seen, unchangeable, and indestructible, atoms were also completely solid, with no internal structure, and came in an infinite variety of shapes and sizes, which accounted for the different kinds of matter. Color, taste, and other intangible qualities were also thought to be composed of atoms

Democritus a Greek Philosopher came up with the idea of atoms

Atoms were very small & indestructible

Atoms made up all matter

Which one of these statements is incorrect?

Compare & contrast the atomic models of Aristotle, Democritus, and Dalton

Understand the Law of Conservation of Mass

CLE 3221.1.1 Compare and contrast historical models of the atom.

SPI 3221.1.1 Compare and contrast the major models of the atom (e.g., Democritus, Thomson, Rutherford, Bohr, and the quantum mechanical model).

CLE 3221.2.1 Investigate the characteristic properties of matter.

SPI 3221.2.1 Distinguish among elements, compounds, solutions, colloids, and suspensions.

Most common substances exist as solids, liquids, & gases

Matter can undergo physical/chemical changes

Mixtures are combinations of two or more substances

A compound is a combination of two or more elements.

Elements are made of atoms

Several thousand years ago Greek philosophers began to speculate about the nature of matter.

They formulated explanations based on their life experiences.

Democritus: 460-370 B.C

Aristotle: 384- 322 B.C.

Matter is composed of atomos (atoms), which move through empty space.

Atoms are solid, homogeneous, indestructible, and indivisible.

Different kinds of atoms have different shapes and sizes.

Size, shape, and movement of atoms determine the properties of matter.

Empty space can not exist.

Matter is made up of earth, fire, air, and water.

He revised Democritus’ idea based on scientific results(scientific method/experimentation).

He marks the beginning of what would eventually become the “Modern Day Atomic Theory”.

Matter is composed of extremely small particles called atoms.

Atoms are indivisible and indestructible. Atoms of a given element are the same

size, mass, and chemical properties. Atoms of specific elements are different

from those of another element. Different atoms combine in simple whole-

number ratios to form compounds In a chemical reaction, atoms are

separated, combined or rearranged.

A. Dalton

B. Democritus

C. Aristotle

Empty space can not exist.

In a chemical reaction, atoms are separated, combined or rearranged.

Matter is composed of atomos

This law simply states that the mass of the reactants in a chemical equation must equal the mass of the products.

* Hydrogen Molecule + Oxygen Molecule → Water Molecule

Section 4.1 Assessment Page 105; 1-6 Due:

MR – Wednesday

TF – Wednesday

EXTRA CREDIT!!!!!Chapter 4 On-lineQuizzes

Compare & Contrast Aristotle, Democritus, and & Dalton’s Ideas About the Atom using a graphic organizer

Aristotle

Atoms

Dalton

Democritus