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