Particle Theory
True or False: The particles that make up matter are always in motion.
True
If one or more new substances are produced is it a physical or chemical change
Chemical Change
How many rows / periods are on the periodic table
7
What is the negative particle
Electrons
What charge do all atoms have?
Neutral
What can matter exist as?
Solid, Liquid and Gas
Differentiate qualititative properties and quantititative properties
Qualitative physical properties are those you can observe with your senses. Examples include physical state, odour, colour, texture, and lustre. Quantitative physical properties are those that you measure and give a number value, such as an object’s mass, volume, and temperature.
What are the two types of mixtures matter can be classified into
Homogeneous mixtures (solutions), Heterogeneous mixtures (mechanical mixtures)
What does the atomic number represent
The number of protons in an element
What are Ions?
Particles with either a positive or negative charge
How does the movement of particles change as the temperature decreases
Particles will slow
List three chemical properties and three physical properties
Physical: State, Odour, Colour, Texture, Clarity, Lustre, Malleability, Brittleness, Ductility, Melting Point, Viscosity, Solubility, Hardness, Conductivity, Density
Chemical: Combustibility, Reactivity, Light Sensitivity,
What are the two types of pure substances matter can be classified into
Elements and compunds
How do you calculate atomic mass
Number of Protons + Number of Neutrons = Atomic Mass
Which family / group of the periodic table is the most stable
Group / Family 18, noble gases
Which type of particles can easily be compressed
Gas
Differentiate physical and chemical change
Physical Change - A change in which the composition of the substance remains the same
Chemical Change - A change in the starting substance(s) that results in a new substance
Do noble gases have high or low levels of reactivity
Very low levels of reactivity
JJ Thompson was responsible for which model
Plum pudding model
Atoms with negative charges are called what?
Anions
Define matter
Anything that has mass and takes up space (volume)
Describe physical properties
A physical property is a characteristic or description of a substance that may help to identify it. It can be observed or measured (density, boiling point, melting point) without it forming a new substance.
Who developed the first version of the periodic table in 1869
Dmitri Mendeleev
Who proposed there is "a dense positively charged center (called the nucleus) in the atom"
Ernest Rutherford in 1911
Two oppositely charged ions attracted to one another that combine form what?
An ionic compound