Historically, arsenic was used on rats. Some insecticides used thallium, a heavy metal.
arsenic
Lutetium is found in the nature as a phosphate; lutetium is a scarce and expensive element.
alloy
The more reactive it is the more less likely it is to be found in pure form
Aluminum.
The atomic mass number is the sum of the protons and neutrons of an element. The protons are given by the atomic number, so the neutrons can be found by subtracting the mass number by the atomic number. Both the mass and atomic numbers can be found on the periodic table.
Arsenic is a common rat poison often found in mystery titles. Arsenic and Old Lace
Arsenic is a common rat poison often found in mystery titles. Arsenic and Old Lace
Arsenic (and Old Lace).
"Arsenic"
Arsenic.
Arsenic is used in rat poison and is in the title "Arsenic and Old Lace."
Arsenic is used in rat poison and is in the title "Arsenic and Old Lace."
arsenic
carbon is used in rat poison and is the title of a murder mystery
arsenic
Arsenic is used in rat poison and is in the title "Arsenic and Old Lace."
arsenic