chemistry
All of the following are amino acids except
Adenine
A mole contains Avogadro's number of items. What is Avogadro's number?
6.023 x 10^23
All of the following elements are liquids around room temperature except which one?
Magnesium
Who is credited with the invention of the modern periodic table?
Mendeleev
Noble gases are inert because they have completed outer electron shells. Which of these elements isn't a noble gas?
Chlorine
What is the most common isotope of hydrogen?
Protium
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.
You can't live without iron. Where in the body is most of the iron located?
your blood
One of the essential minerals in the human body is salt. How much salt (NaCl) is in the average adult human body?
250 grams
The symbol Sb stands for stibnum or stibnite. What is the modern name of this element?
Antimony
You can't live without water! What is its chemical formula?
H2O
The symbol Ag stands for which element?
Silver
Which of these elements is a nonmetal?
Sulfur
Water-based liquids can be described as acidic, neutral, or basic, with respect to pH. Which of these describes milk?
Slightly Acidic
In a solution of saltwater (a saline solution), salt is the
Solute
What do you call an atom that has more protons than electrons?
a cation
Three of the most common states of matter are solids, liquids, and gases. A liquid has
a defined volume, but not a defined shape
A drop of food coloring spreading out in a cup of water is an example of which transport process
Diffusion
Organic chemistry is the study of the compounds that make up living organisms. All organic molecules contain
Carbon and Hydrogen
DNA codes for proteins, which are the building blocks of organisms. What is the most abundant protein in the human body?
Collagen
