College Prep -
Who is credited with the invention of the modern periodic table?
Mendeleev
what element is nonmetal
sulfur
One of the essential minerals in the human body is salt. How much salt (NaCl) is in the average adult human body?
250 grams
what is the chemical formula for water
H2O
What do you call an atom that has more protons than electrons?
a cation
what is the most common isotope of carbon
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 it melts
The symbol Sb stands for stibnum or stibnite. What is the modern name of this element?
antimony
You can't live without iron. Where in the body is most of the iron located?
blood
Organic chemistry is the study of the compounds that make up living organisms. All organic molecules contain:
carbon and hydrogen
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
Three of the most common states of matter are solids, liquids, and gases. A liquid has:
defined volume, not shape
Water-based liquids can be described as acidic, neutral, or basic, with respect to pH. Which of these describes milk?
slightly acidic
AG stand for?
Silver