Describes the ability of a substance to change into a new substance(s). I.e. reacts with water, emits heat, reacts with acid
What is a chemical property?
100
The substance remains the same substance even though it may change form, state or dissolve
What is a physical change?
100
This scientist was ignored for 2,000 years and used the word "atomos"
What is democritus?
100
This encompasses everything that isn't matter.
What is energy
200
A mixture that you can visibly see the parts i.e. salt and pepper
What is a mechanical mixture?
200
Uses words to describe a substance's physical properties
What is qualitative?
200
The original substance is being changed into a different substance with different properties. This change is not easily reversible
What is a chemical change?
200
Proposed the raisin/plum pudding model
What is J.J Thomson?
200
The two categories are homogeneous and heterogeneous
What is the two categories of mixtures?
300
Usually a liquid mixture that is cloudy with tiny particle in it. Will eventually settle i.e. muddy water
What is a suspension?
300
Examples of this physical property category include density, boiling point, melting point, and solubility.
What is quantitative property examples?
300
Examples of this change include ripping a piece of paper, melting ice or dissolving salt.
What is examples of physical change?
300
Ernest Rutherford used this lab technique to discover that the protons and neutrons were found in a dense core (the nucleus)
What is the gold-foil experiment?
300
Frost forming on a window and a light bulb light up is an example of this type of change
What is a physical change?
400
A pure substance that is made of more than one element bonded together i.e. table salt (NaCl)
What is a compound?
400
The amount of mass in a given volume of a substance
What is density?
400
Heat/Light given off, a precipitate forming, a gas being formed, or a change in colour
What is indicators that a chemical change has occurred?
400
Bohr suggested that electrons surround the nucleus in shells/orbitals. There are two electrons in this # shell.
What is the number of electrons in the first shell?
400
This scientist described his findings "like shooting bullets at a tissue paper that got deflected and thrown back at him"
What is Ernest Rutherford
500
1. All matter is composed of tiny objects called particles
2. All particles have spaces between them
3. Particles present in matter are always in motion
4. Particles in a substance attract each other
What is the postulates of the particle theory of matter?
500
describes a characteristic of a substance that can be observed or measured
What is a physical property
500
A plant growing is an example of this type of change
What is an example of a chemical change?
500
This scientist believed that atoms of the same element have the same properties while different elements have different properties
What is John Dalton?
500
Electrons that fall in the outermost shell of an atom are also called this.