Matter 1
What does the law of conservation of matter tell us?
Matter cannot be created nor destroyed, only changed
What is the exception to the general density rule, meaning the solid form is less dense than liquid form.
Water
What term is interchangeable (meaning it is a synonym) with the word "atom"?
Element
What are the four ultimate "roots" of the world?
Fire, air, earth, water.
Who is known as the "Father of the Periodic Table"?
Dimitri Mendeleev
What is a pure element?
A piece of matter made up of only one type of atom.
During cooling or freezing, what do particles do?
Move slower and become closer together.
Name the three subatomic particles and their charges.
Protons: Positive. Neutrons: Neutral. Electrons: Negative.
What does atoms (atomos in Greek) mean?
Uncuttable
What is the octet (or noble gas) rule?
Atoms want to have 8 valence electrons to achieve stability
What is the general density rule?
Solids are denser than liquids. Liquids are denser than gases.
During warming or boiling, what do particles do?
Move faster and become farther apart.
Some atoms are not found in nature and are synthetic. What does synthetic mean?
Man-made.
Which Greek Philosopher came up with the word atoms (atomos)?
Democritus
The periodic table is ordered by the increasing number of what?
Protons
Endothermic or exothermic reaction: Matter absorbs heat and is influenced by the surroundings.
Endothermic reaction
What is the amount of force pushing on a substance?
Pressure
When was the first model of the atom popularized (John Dalton's spherical model)?
1803
What model of the atom was theorized in 1926 and is still used today?
Quantum model (electron cloud model)
How do ions form?
When atoms share, lose, or gain electrons
Endothermic or exothermic reaction: Matter releases heat and influences the surroundings.
Exothermic reaction
What do temperature production, light creation, unexpected color change, or different smell tell us has happened?
Chemical change (chemical reaction)
What date was today's periodic table made?
2016
What model do we most use today because it shows us the electron shells and electron numbers?
Bohr's model (planetary model)
Describe what an isotope is.
Atoms with the same number of protons but different number of neutrons.