The Periodic Table
Chemical Bonds
Chemical Reactions
Atomic Models
The Carbon Cycle
100
Atomic number
What is the number of protons in the nucleus?
100
Atoms that have gained or lost an electron.
What is an ion?
100
A chemical reaction that absorbs energy.
What is an endothermic reaction?
100
The description of the structure of an atom.
What is an atomic model?
100
photosynthesis
How is carbon utilized by plants?
200
A metal from group 1
Which group of elements are most likely to form an ionic bond?
200
Atoms that bond by gaining or losing electrons.
What is an ionic bond?
200
fireworks exploding, paper burning, cellular respiration
What are exothermic reactions?
200
energy level, orbital, or shell
Where are the electrons located?
200
Carbon is excreted as CO2 gas
What is respiration?
300
Group 4, Period 6, number 72
What is the location of hafnium on the periodic table?
300
Atoms that bond by sharing electrons.
What is a covalent bond?
300
8Fe + S8 ---> 8FeS
What is a balanced chemical equation?
300
Elements that have the same number of protons but different numbers of neutrons.
What is an isotope?
300
A person driving a car
What is an example of combustion of fossil fuels?
400
Rubidium has one.
How man valence electrons does rubidium have?
400
Sodium chloride is formed when the metal sodium bonds to the nonmetal chlorine.
What is an example of an ionic bond?
400
Milk that has been left out of the refrigerator for a week separates into a yellow liquid and lumpy white chunks that smells bad.
What is an example of a chemical reaction?
400
An atom has 8 valence electrons.
What is a stable atom?
400
The excess warming of earth's atmosphere.
What is global warming?
500
This element reflects light well, warms up in the palm of your hand, flattens out when hit with a hammer, and conducts electricity.
What is a metal?
500
Two oxygen atoms share two pairs of electrons
What is an example double, covalent bond?
500
Matter is neither created nor destroyed, it just changes form
What is the law of conservation of matter?
500
new information about an atom's structure is discovered
What is a revised atomic model?
500
respiration, photosynthesis, decomposition, combustion
What is the path of a carbon atom from human to a car?
M
e
n
u