Particle Diagrams
Draw a particle diagram for an element
All the same shape/size/color
Melting Point, Flammability, Color are examples of this in general
Physical Property
In a chemical reaction these substances are on the left side of the yields arrow
reactants
Scientist who discovered the nucleus and protons did this experiment
Gold Foil Experiment
This number identifies a particular element. For example, bromine's is 35.
Atomic Number or number of protons
Draw a particle diagram of a compound
Two different shapes or colors or sizes touching
Wood burning is an example of this
chemical reaction or change
A substance is in this state of matter when it is the solute dissolved in water solvent
Aqueous (aq)
Thomson improved Daltons model by including these two areas in an atom
A positive region with negative particles throughout
The vast majority of an atom's mass is due to these two particles and make up the mass number.
proton and neutron
Draw a particle diagram of a mixture with one element and a 2-element compound
Element is one size/color/shape
Compound is 2 different sizes/colors/shapes touching
element and compound not touching
Mass, length, volume are examples of this kind of physical property
Extensive
The substances on the right side of the yields arrow are known as this
products
In the Planetary Model, electrons are located here
In orbits around the nucleus
An isotope of phosphorus is phosphorus-32. It has this many neutrons.
Draw a heterogeneous mixture with a solid in a liquid
Solid particles are close together and touching each other, not touching the liquid
Liquid a series of particles around the solid and the particles are not touching each other or only a few are touching
Freezing water into ice is an example of this kid of change
physical change
The Law that states that mass is neither created nor destroyed is known as this
Law of conservation of mass
He was the first scientist to give a name to the smallest unit of matter which he called Atomos
Isotopes of the same element all have this number of things in common
the number of protons
Draw a homogeneous mixture of two gases
2 different sizes/shapes/colors
Density, melting point, odor are examples of this kind of physical property
Intensive
A student is filtering a mixture of sand and water. The mixture had a mass of 15.5 g and the amount of water collected was 10.7 g. The sand had a mass of this.
4.8 g
James Chadwick slightly improved Rutherford's model by including this subatomic particle in the nucleus because it also attributed to the mass of an atom
Neutron
The mass number for a particular element is not on the periodic table, but the average atomic mass is. The average atomic mass is used for this reason.
The average is a weighted average that takes into account that percent abundance of each isotope present in the sample/universe.