Vocabulary
Atomic Models
Chemical and Physical change
Chemical and Physical property
Miscellaneous
100

Pure substance

A material that is made of the same tiny particles 

100

Explain Dalton's theory of the atom

all things are made up of tiny particles called atoms, atoms cannot be created destroyed or divided into smaller pieces, atoms have identical sizes and mass in the same pure substance each substance is different, compounds are created when atoms of different elements link together

100

Chemical Change

causes one or more new substances

100

What is physical property?

something you can observe or measure

100

Explain the law of definite composition

compounds are pure substances that contain two or more elements combined together in a definite proportion

200

Alchemist 

hands on investigator of matter, part pharmacist, part mystic, practiced in Europe and Middle East

200

Explain Thomson's theory of the atom?

Plum pudding or raisin bun model, he pictured the negatively charged electrons stuck in the positively charged mass like a raisin bun

200
Physical Change

is when a substance changes in form but not in chemical composition.

200

what is chemical property?

anything that explains how it will react with another substance

200

Explain the law of conservation of mass

In a chemical change the total mass of the new substance is always the same amount as the original substance.

300

Electrolysis 

The process of decomposing chemical compounds by running electricity through them

300

Explain Rutherford's theory of the atom?

he hypothesized that all mass of the atom was in the center known as the atomic nucleus. The rest of the atom was empty and full of smaller electrons, he also gave positively charged particles the title protons.

300

List the clues that help to determine if it is a chemical change

Changes are difficult to reverse, heat is released or absorbed, starting material is used up, gas bubbles formed in liquid, participate forms in liquid, change in color, material with new properties is formed

300

In what two groups can physical property be split in?

Quantitive and Qualitative physical property

300

What did Antoine Lavoisier do for the study of chemistry?

defined elements as pure substances that cannot be decomposed into a similar substance by means of chemical change, found 23 pure substances

400

Homogeneous

when particles are evenly distributed and cannot be seen in the mixture

400

Explain Bohr's theory of the atom

pictured the atom like a mini solar system with electrons rotating around an atomic nucleus, he refined this model by saying the electrons move on fixed pathways similar to planets in the solar system

400

Give an example of physical change

ice -> water

400

What is Quantitive physical property? 

Something that can be measured. Ex. viscosity

400

What did Robert Boyle discover in the early years of chemistry

He recognized that elements could be combined to form compounds laying the ground work for the future of chemistry. 

500

Heterogeneous 

when particles are not evenly distributed and can be seen in the mixture

500

Explain Shrodinger's theory of the atom

found that electrons have certain energy levels and acted as waves, he then provided a mathematical formula to determine where an electron was in relation tot the nucleus. This is known as the election cloud model.

500

Give an example of chemical change

burning wood

500

What is Qualitative physical property?

something that can be described. Ex. Color

500

List the 5 points on the Particle Model of Matter

All things are made up of tiny particles, Particles are always in motion, Particles are attracted to each other, Each pure substance has unique particles different from other pure substances, Particles at high temp move faster than particles at low temp

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