the region of the atom that contains nearly all of the mass
What is the nucleus?
100
there are 18 of these (which run across the top of the periodic table)
What are groups/families?
100
the type of chemical reaction when heat is given out
What is an exothermic reaction?
100
a substance that contains only one type of atom
What is an element?
100
the 3 main categories on the periodic table
What are metals, nonmetals, and metalloids?
200
a particle in the nucleus of an atom that is neutral.
What is neutron?
200
there are 7 of these, which run down the side of the periodic table
What are periods?
200
the type of chemical reaction when heat is taken in/ it gets cooler.
What is an endothermic reaction?
200
how you figure the number of protons an atom has
What is look at the atomic number of the element?
200
elements in the same _______________ share similar properties
What is group/family?
300
the region of the atom that the electrons exist in
What is the electron cloud?
300
the information you can get by looking at the second digit of the group number
What is valence electrons for an atom?
300
the type of chemical reaction when an element by itself butts in to a compound
What is single replacement?
300
how you figure out the number of electrons an atom has
What is the same number as protons?
300
the type of chemical bond when atoms are SHARED
What is a covalent bond?
400
the formal name of the "energy levels" the electrons exist in
What are electron shells?
400
the information you can get by looking at the period number
What is number of electron shells?
400
the type of reaction when a compound breaks down into its individual parts
What is decomposition?
400
how you figure out the number of neutrons an atom has
What is atomic mass - atomic number?
400
the type of chemical bond when atoms are TRANSFERRED
What is an ionic bond?
500
the discovery by Schrodinger/Heisenberg about the atom (this is the current model of the atom)
What is that the electrons do not orbit in fixed paths, but exist randomly in different "energy levels"?
500
Using a periodic table, determine the following element:
I have more valence electrons than Silicon, but less than Sulfur. I also have more protons than Potassium, but less than Selenium. What am I?
What is Arsenic?
500
the type of reaction when two compounds switch parts with each other
What is double replacement?
500
different versions of the same element. Where the protons remain the same but the number of neutrons are different.
What is an isotope?
500
the reason why we need to balance chemical equations
What is the law of conservation of matter? You must always have the same amount in the end as the beginning.