Atomic Theory

Question 1

Structure of atoms

Answer 1

Atomic Theory

Question 2

• Theory proposed by D is called?
• ___ Century
• All matter is made up of tiny, indivisible particles called atoms, which are in constant motion and are too small to be seen with the naked eye

Answer 2

Atomism
Decomocritus
5th Century

Question 3

Solid Spehere Model:
- Year _____
- Discovered by ______
- Atoms are tiny indestructible speres
- compared to _______

Answer 3

1804
John Dalton
Billiard Ball

Question 4

_________________:
- year 1904
- proposed by ________
- Positively charged sphere wuth negatively charged electrons distributed

Answer 4

Plum Pudding Model
J. J. Thomson

Question 5

Nuclear Model:
- Year ____
- Proposed by ______
- mass of an atom is concentrated in a tiny, positively charged nucleus at the center, with negatively charged electrons orbiting around it.

Answer 5

1911
Earnest Rutherford

Question 6

What are the subatomic particles of an atom? (3)

Answer 6

Proton, Neutron, Electron

Question 7

The nucleus of am atom is about _______ times smaller than the overall size of the atom

Answer 7

100,000

Question 8

______ are groups of two or more atoms that are held together by chemical bonds.

Answer 8

Molecules

Question 9

How many and which atoms makes a single water molecule?

Answer 9

2 Hydrogen + 1 Oxygen Atom

Question 10

How many and which atoms makes a single oxygen molecule?

Answer 10

1 Oxygen + 1 Oxygen Atom

Question 11

How many and which atoms makes a single carbon dioxide molecule?

Answer 11

1 oxygen atoms + 2 Carbon atoms