ELEMENTS

What is the lightest element in the periodic table?

• Helium

• Hydrogen

• Air

• Neutrons

A human's thumb is as long as his or her nose -

• True

• False

What percentage of Water in the human body?

• 50%

• 66%

• 75%

• 80%

Which of these Metals is found in Hemoglobin, the Oxygen carrying protein that makes blood red?

• Aluminium

• Iron

• Zinc

• Sodium

What are the most common elements in the human body?

• Phosphorus, Nitrogen, Calcium

• Sulfur, Sodium, Magnesium

• Copper, Zinc, Selenium

• Oxygen, Carbon, Hydrogen

Carbon is the basis of life and organic chemistry. the symbol for Carbon is

• Ar

• C

• Ca

• Cr

___________ is found in your bones and teeth. The symbol is

• C

• Ca

• Cl

• Cm

How many total atoms are in a molecule of H2O?

• 0

• 1

• 2

• 3

An element is composed of _________

• Compounds

• Atoms

• Molecules

• None

Deficiency of which element will cause this effect

• Iodine

• Iridium

• Indium

• Iron