This well-known compound of chloride, sodium chloride (NaCl) is better known as.
What is salt?
100
This is the atomic number and symbol of bromine.
What is 35 and Br?
100
This is the atomic number and symbol of iodine.
What is 53 and I?
100
Astatine has this atomic number and symbol.
What is 85 and At?
200
The atomic number of Fluorine.
What is 9?
200
Chlorine's location on the periodic table.
What is period 3, group 7A?
200
Even though bromine is quite rare on Earth, its high solubility has caused it to accumulate in these.
What is the oceans?
200
Name one of the two leading countries in production of iodine.
What is Japan and Chile?
200
Reflecting its chemical reactivity and its group, astatine comes from the Greek "astatos", meaning this.
What is unstable?
300
The latin prefix "fluo" means this.
What is "flow"?
300
Chlorine gas, also known as bertholite, was first used as a weapon in this war.
What is World War I?
300
Name any of the two top three countries of bromine production (extraction from brine pools).
What is United States, China, and Israel?
300
Iodine is considered less abundant than the "rare Earth metals", so iodine is most often extracted as this mineral.
What is iodate?
300
Astatine is this kind of element, meaning it acts as both a metal and non-metal.
What is a metalloid?
400
It was discovered in 1866 in this country by Henri Moissan.
What is France?
400
Fluorine is a (metal, non-metal, metalloid) and is (very reactive, stable) due to it having (1,2,3,4,5,6,7,8) valence electrons.
What is non-metal, very reactive, 7?
400
Bromine is a more effective but also more expensive than chlorine when used to clean these.
What are swimming pools?
400
Radioactive isotopes of iodine can be used to treat this type of cancer.
What is thyroid cancer.
400
The most stable isotope of astatine, At-210, has a half-life of only about __ hours.
What is 8?
500
This compound including fluorine is used widely in dental care in products like toothpaste.
What is fluorapatite?
500
This man named chlorine after its pale green color (in Greek).
Who is Sir Humphry Davis?
500
Antoine Balard named bromine "brôme", which reflects this physical property of the element.
What is "stench", or bad odor?
500
Iodine gas has this color, which reflects its name, which comes from the Greek "_____-colored".
What is violet?
500
Iodine is the least abundant of all of the naturally occurring elements, and only around __ grams of astatine can be found in all of Earth's crust at any given time.