Physical v.s. Chemical Changes
A physical change is when...
What is a change occurs to a substance that changes it's physical form, but not the chemical composition (substance stays the same)
You are observing a ____ property, when cutting a lemon into slices
physical property
What is the periodic table ordered by?
Atomic number
The 5 main periodic trends
What are nonmetal increase, atomic radius, ionization energy, metallic levels, and electronegativity
An endothermic reaction occurs when...
What is the system absorbs heat/energy from it's surroundings
A chemical change is when..
What is when a chemical reaction occurs that changes the chemical composition of the substance (rearranges atoms to form a new substance)
You are observing a _____ property when you watch a log on fire die down to ashes
chemical
What is atomic mass?
The weight of the protons and neutrons together
This atom has the highest level of ionization energy
What is Fluorine
An exothermic reaction occurs when...
What is when the system releases heat into the surroundings
Mixing paint is what type of change?
physical change
What is a chemical property?
properties that can be observed or measured when a substance goes through a chemical change
What is an atomic number?
The number of electrons in an atom
Noble gasses are not a part of the periodic trends because...
What is Noble Gasses are not reactive because their electron shells are full (no tendency to lose, share, or gain electrons)
Photosynthesis is an example of (endothermic or exothermic)
What is an endothermic reaction
Classify what type of change is rust?
Chemical change
What is a physical property?
properties that can be observed and measured without changing a substance’s overall identity
What element on the periodic table is Pb?
lead
This element has the lowest levels of electronegativity
What is Francium
Lighting a match is an example of...(exothermic or endothermic)
What is an exothermic reaction (releasing heat into the environment)
What does iron interact with to produce or create rust?
iron interacts with oxygen and water to form iron oxide (rust)
Color, density, hardness, melting, and boiling points are examples _____ properties?
physical
What is the periodic table symbol for silver?
Ag
This element has the lowest Atomic Radius
What is Fluorine
Melting ice is an example of ...(endothermic or exothermic)
What is an endothermic reaction