CHEMISTRY 1
One of the essential minerals in the human body is salt. How much salt (NaCl) is in the average adult human body?
250 grams
A mole contains Avogadro's number of items. What is Avogadro's number?
6.023 x 10^23
Who is credited with the invention of the modern periodic table?
Mendeleev
The symbol Sb stands for stibnum or stibnite. What is the modern name of this element?
antimony
Organic chemistry is the study of the compounds that make up living organisms. All organic molecules contain ... ?
carbon & hydrogen
What do you call an atom that has more protons than electrons?
cation
Noble gases are inert because they have completed outer electron shells. Which of these elements isn't a noble gas?
chlorine
DNA codes for proteins, which are the building blocks of organisms. What is the most abundant protein in the human body?
collagen
All of the following elements are liquids around room temperature except which one?
magnesium
What is the most common isotope of hydrogen?
protium
The symbol Ag stands for which element?
silver
Water-based liquids can be described as acidic, neutral, or basic, with respect to pH. Which of these describes milk?
slightly acidic
What's an example of an element that is a nonmetal?
sulfur
If you fill a glass to the brim with ice water and the ice melts, what will happen?
the water level will drop slightly as the ice melts
Where in the body is most of the iron located?
your blood