Chapter 4

Question 1

Top 4 elements in the human body

Answer 1

Oxygen, carbon, hydrogen, nitrogen

Question 2

Dalton’s atomic theory

Answer 2

An atom it extremely small particle of matter that retains its identity during chemical reactions.

Question 3

Top 4 elements on Earth

Answer 3

Oxygen, silicon, aluminum, iron

Question 4

What is between atomic number and mass number?

Answer 4

The atomic number is the number of protons in an atom of an element, while the atomic mass is the mass of protons and neutrons of a specific isotope of a given element.

Question 5

What did Walsh study

Answer 5

Prisoners

Question 6

Cr (Chromium)

Answer 6

Helps metabolize sugars

Question 7

I (Iodine)

Answer 7

Proper functioning of thyroid

Question 8

Mn

Answer 8

Maintain proper Ca level in bones

Question 9

Cu (Copper)

Answer 9

Involved in production of red blood cells

Question 10

Li (Lithium)

Answer 10

Used for treatment of manic depression

Question 11

JJ Thomson

Answer 11

1897
Cathode Ray Experiment
Discovered electrons

Question 12

Robert Millikan

Answer 12

1909

Oil Drop Experiment

Question 13

Ernest Rutherford

Answer 13

1911

Gold Foil Experiment

Question 14

Rutherford and Chadwick

Answer 14

1932