Chapter 3

Question 0

Who created the Atomic Theory of Matter?

Answer 0

Dalton

Question 1

What is an atom?

Answer 1

Smallest particle of an element that holds all the chemical identity of that element.

Question 2

What is the Atomic Theory of Matter?

Answer 2

Each element is made of atoms, atoms Re not created or destroyed, each given compound has the same number and kinds of atoms, and all atoms of an element is identical but differ from others.

Question 3

Who created the Law of Constant Composition?

Answer 3

Joseph Louis Proust

Question 4

What is the Law of Constant Composition?

Answer 4

All given compounds hold the same elements in the same proportion by mass.

Question 5

Who created the Law of Conservation of Matter?

Answer 5

Lavoisier

Question 6

Who said all matter is composed of atoms?

Answer 6

Democritus

Question 7

Who said that the charge of the atom had something to do with electricity?

Answer 7

Michael Faraday

Question 8

The negatively charged electrode of a cathode ray tube was..

Answer 8

Cathode

Question 9

Radioactivity was working with a sample of..

Answer 9

Uranium

Question 10

What is an Ion?

Answer 10

An atom that loses or gains an electron to acquire a net charge.

Question 11

What is a Cathode Ray Tube?

Answer 11

The tube used by Thompson in his expiriment.

Question 12

What is the positive subatomic particle inside the nucleus of an atom?

Answer 12

Proton.

Question 13

What is an Isotope?

Answer 13

Atoms that have the same number of protons but differ in the number of neutrons.

Question 14

What is the number on the periodic table that is equal to the number of protons?

Answer 14

Atomic Number

Question 15

What is the expressed mass of one atom or particle?

Answer 15

Atomic mass unit

Question 16

What is the negatively charged particle that moves outside the nucleus?

Answer 16

Electron

Question 17

What is the average masses of the existing isotope of an element?

Answer 17

Atomic mas