Human Chemistry 3

Question 1

Define Antioxidants:

Answer 1

Chemicals that neutralize free radicals

Ex: Vitamim C

Question 2

Define Radioisotopes:

Answer 2

Unstable isotopes that amit radiation

Question 3

All elements have at least ONE?

Answer 3

Radioisotope

Question 4

Define Ionizing Radiation:

Answer 4

High energy radiation that converts neutral atoms into IONS

Question 5

Why is Ionizing Radiation bad for you?

Answer 5

Produces free-radicals which can destroy cells and tissuea

Question 6

In loe doses ionizing radiation can be?

Answer 6

Mutagenic, cause DNA mutations or cancer

Question 7

In high doses ionizing radation can cause?

Answer 7

Death

Question 8

The periodic table of elements organizes elements by?

Answer 8

The # of protons/ Atomic #

Question 9

How many elements are found in humans?

Answer 9

24

Question 10

The most COMMON elements in humans are?

Answer 10

CHON (CA)P
Oxygen
Carbon
Hydrogen
Nitrogen
Calcium
Phosphorus

Question 11

Define Molecule:

Answer 11

Electrically neutral groups of 2 or more atoms, held together by chemical bonds

Question 12

A subscript after a symbol/letters tells us?

Answer 12

The # of atoms in the molecule

H2

Question 13

Define Chemical Bond:

Answer 13

Interaction b/w atoms that bind together to form molecules

Question 14

What is required for Chemical Bonds?

Answer 14

Energy is required and energy is released when bonds are broken