Mr. H. Honors Bio Chemistry

The space surrounding the nucleus of an atom contains which of the subatomic particles

• protons
• neutrons
• electrons
• ions

A substance formed by the combination of two or more elements in a definite proportion is called a ________.

• mixture
• solution
• compound
• atom

The basic unit of matter is...

• a compound
• an element
• a mixture
• an atom

Solutions that release H+ ions in water are considered _______.

• acidic
• basic

Substances produced by cells that produce sharp changes in pH to return cells to a normal range are called _______.

• acids
  aci
• bases
• buffers
• solutes

The TOP 5 ELEMENTS abundant in LIFE are carbon, hydrogen, ______, ________, and ______.

• phosphorus

• calcium

• oxygen

• sodium

• nitrogen

If an atom has a Mass of 20 and has 11 electrons surrounding the nucleus, how many Neutrons does it have?

• 11

• 20

• 9

• Cannot tell from information given.

Lemon has a pH of 3-4. It is a(n)

• Base

• Neutral

• Acid

• None of the above

Soap has a pH of 8. This make it a (n)

• Base

• Acid

• Neutral

• None of the above

WHich substance is INORGANIC

• sugars

• salts

• fats

• proteins