Chapter 1
WHat is the first thing you should do before starting a lab?
Put on goggles
What is the symbol for Calcium?
Ca
What does the atomic number mean?
Tells amount of electrons and protons
What is the rule of 0?
It's the rule where the atoms always have to add up to 0 to balance the element
What is the meaning of insoluble?
Insoluble is something that cannot be dissolved
What is the formula for density?
Density = Mass divided by Volume
What consists of a chemical reaction?
change in the ionic and molecular make-up
What is the atomic mass for?
it's to show how many neutrons there are
Difference between Anion and Cation?
Anions are negative and Cations are positive
How do you know when a substance conducts electricity or not?
If it is a metal it can conduct electricity
How is a car matter?
It is matter because it has mass and takes up space
What is the law conservation of mass?
Mass cannot be created or destroyed
difference between the average atomic mass and the true mass of an atom?
Because the number of neutrons in an atom changes so not every atom can weigh the same
What causes the color change during a flame test?
The metal causes the change
Do all 4 types of bonds react the same way to getting struck by a hammer?
No, every material is different than the other so the reactions are different
If two items are the same shape but have different masses do they take up the same amount of volume?
Yes, because the density doesn't effect the volume
difference between a compound and an element?
a compound is a combination of two or more elements and an element is made up of molecules and atoms
What is a nuclear reaction?
A nuclear reaction is the change is atomic identity
What can you say about an elements electrons by it's position on the periodic table?
Depending on where, it shows the amount of valence electrons connected to the element
What are the four models of bonding?
Molecular covalent, Ionic, Metallic, Network covalent
How can you determine the legitimacy of gold by knowing it's density?
Because gold has a set density so if the material doesn't match then it's fake
how does copper reappear in a compound after a series of chemical reactions where copper wasn't found?
the copper begins in the compound and through the law conservation of mass the copper never truly leaves but is changed throughout the chemical reactions.
What can cause new elements?
Nuclear fission, nuclear fusion, and radioactive decay
What's the difference between a lewis and dot structure and the structural formula?
The lewis and dot structure shows exactly the amount of electrons that are bonded and the structural formula just shows how many bonds there are
What do valence electrons do in covalent bonding?
The valence electrons are shared between atoms and build a very strong network structure