Atomic Structure
Periodic Table
Physical &
Chemical Changes
Chemical Changes
Elementary My Dear
Why does it matter?
100
Where are the electrons found in an atom?
In electron shells/clouds/rings on the outside of the nucleus.
100
How are elements arranged in the periodic table?
The elements are arrange in order of atomic number or number of protons.
100
What is the difference between a chemical and a physical change?
A physical change can be reversed and a chemical change cannot be reversed easily.
100
What is the simplest unit of matter?
An atom
100
Matter exists in these 3 states.
What are solids, liquids, gases (bonus: plasma)
200
What are the three subatomic particle (small particles) that make up an atom?
Protons and Neutrons make up the nucleus of the atom and the electrons are found outside the nucleus.
200
What is the difference between a group and a period?
Groups form vertical columns and periods are horizontal rows.
200
What are three signs of a chemical change?
Color change,
Formation of a gas,
Temperature change, and
Formation of a precipitate
200
A pure substance that is made of only one kind of atom.
What is an element.
200
A bowl of chocolate M&M's is an example of what type of mixture?
Heterogeneous Mixture
300
What is the charge of an electron?
Negative charge.
300
What is the most reactive group of nonmetals?
The Halogens
300
Digesting food turns the food we eat into substances needed for life processes is this type of change.
What is a chemical change
300
An element that conducts heat and electricity well.
What is a metal.
300
Two different ways that matter can change.
What is physical and chemical change.
400
What subatomic particle do we use to identify an atom?
Protons
400
The substance formed from the atoms of two or more elements.
What is a compound
400
A logger cutting down a tree is this type of change.
What is a physical change
400
All atoms of the same element have this in common.
What are protons.
400
What term best describes the change in temperature during a chemical reaction that causes the products to become cold?
Endothermic Reaction
500
How many neutrons does an oxygen atom?
Round the atomic mass which is 16 and subtract the proton number which is 8 (the atomic number).
Neutrons = Atomic Mass - # of protons
Neutrons = 16-8 = 8 neutrons
500
List the following elements in order of their reactivity. Start with the most reactive and move to the least reactive.
Ca , C, Br, K, He
K, Ca, Br, C, He
500
Do physical changes produce compounds or mixtures?
Mixture
500
The element with the symbol Fe.
What is Iron.
500
What happens when a strong base and a strong acid are mixed in equal proportions?
Both the strong base and the strong acid are neutralized.
The product of the reaction will have a more neutral pH than the reactants.