Module 2: Atoms, Molecules, and Ions

Question 1

A Greek word that means invisible/uncuttable

Answer 1

Atomos

Question 2

What is the greek word for Atom?

Answer 2

Atomos

Question 3

It is the smallest particle of an element that remains the properties of that element

Answer 3

Atom

Question 4

A greek who first expressed the idea about what matter is made of.

Answer 4

Democritus (460-370 BC)

Question 5

According to him, Matter is made of tiny invisible particles called atoms

Answer 5

Democritus (460-370 BC)

Question 6

He is regarded as the “Father of Atomic Theory” in recognition of the importance of his work to the development of chemical knowledge.

Answer 6

John Dalton

Question 7

True or False

All matter is composed of tiny, indivisible particles called atoms

Answer 7

True

Question 8

True or False

All atoms of a particular element are identical but the atoms of one element differ from the atoms of any other element

Answer 8

True

Question 9

True Or Flase

Atoms of different elements combine with each other in certain whole-number proportions to from compounds.

Answer 9

True

Question 10

True Or False

In a Chemical reaction, atoms are rearranged to form new compounds; they are not created, destroyed, nor changed into atoms of any other element

Answer 10

True

Question 11

Who were the 2 people that made major discoveries of the atomic structure

Answer 11

Henri Becquerel
Marie Curie

Question 12

A french physicist who was awarder the Nobel Prize in Physics in 1903 for discovering radioactivity in Uranium

Answer 12

Henri Becquerel

Question 13

Received a nobel prize in Chemistry in 1911 for her experiments on radioactivity that led to the discovery of new elements like Polonium and Radium.

Answer 13

Marie Curie

Question 14

What are the 3 subatomic particles of Atom

Answer 14

Proton
Neutron
Electron

Question 15

A negatively charged subatomic particle with a value of NEGATIVE ONE

Answer 15

Electron

Question 16

He discovered Electrons by observing the properties of a Cathode Ray

Answer 16

Sir Joseph John Thomson (JJThomson)

Question 17

The glowing beam which travels from the cathode to the anode

Answer 17

Cathode ray

Question 18

He determined the ratio of the charge of the electron to its mass

Answer 18

J.J. Thomson

Question 19

He determined the actual charge of an electron using Oil-Drop experiment

Answer 19

Robert Milikan

Question 20

This subatomic particle was discovered from experiments using cathode-ray tubes

Answer 20

electrons

Question 21

It is a positively charged particle with a value of +1

Answer 21

Proton

Question 22

The Greek word of Proton meaning “first”

Answer 22

Protos

Question 23

He was given the honor of discovering the positively charged particle/proton

Answer 23

Ernest Rutherford (1871-1937)

Question 24

An uncharged particle with a mass slightly greater than that of a proton

Answer 24

Neutrons

Question 25

He discovered Neutron by correctly interpreting an experiment from the bombardment of beryllium with high-energy alpha particle

Answer 25

James Chadwick

Question 26

True or False

Each element differs from the preceding element by having one more positive charge in its nucleus

Answer 26

True

Question 27

It is the number of Protons in the nucleus of an atom

Answer 27

Atomic Number

Question 28

Elements that consist of different masses.

Answer 28

Isotopes

Question 29

How many protons and electrons do Isotopes have?

Answer 29

Protons and Electrons are equal

Question 30

True or False

Isotopes DOES NOT differ in mass because they have different number of Neutrons

Answer 30

False