Unit 1: Anatomy of an Atom

Question 1

What elements are most common in living organisms?

Answer 1

Hydrogen
Oxygen
Nitrogen
Carbon

Question 2

What is mass # and atomic number?

Answer 2

Mass #- protons and neutrons

atomic number- number of protons in nucleus

Question 3

What is an electron?

Answer 3

Electron- negative charge, determine chemical behavior and bonding

Question 4

characteristic of Alpha

Answer 4

Z-2 A-4, skin penetrating. Protection- clothes

Question 5

characteristic of Beta

Answer 5

add proton, take away electron high energy electron. Penetrate below skin, plexiglass

Question 6

characteristic of Gamma

Answer 6

high energy photon, no effect, right through. Penetrate internal tissue, shielding- lead plates

Question 7

what is a proton

Answer 7

proton- positive charge, determine mass and element

Question 8

what is a neutron

Answer 8

neutron- no charge, determine isotope

Question 9

Isotopes are

Answer 9

atoms with same atomic number but different mass number. determine by neutron

Question 10

Elements can’t be

Answer 10

broken down

Question 11

Half life(T1/2)

Answer 11

Constant that states time for 50% of radioactive atoms in a given sample to decay