Early Atomic Theory Ch.5

Question 1

Democritus believed that all matter was composed of four elements true or false.

Answer 1

False

Question 2

Aristotle thought that all matter was composed of four elements . True or False

Answer 2

False

Question 3

Dalton proposed that atoms of the same element are alike in mass and size. True or false

Answer 3

True

Question 4

A compound always contains two or more elements combined in a definite proportion by mass. True or False?

Answer 4

True

Question 5

The two chemicals CH4 and C8H18 are examples of the law of multiple proportions. True or false

Answer 5

True

Question 6

Electric charge may be transferred from one object to another. True orFalse?

Answer 6

True

Question 7

Like charges repel one another. True orFalse ?

Answer 7

True

Question 8

Svante Arrhenius discovered ions. True or False?

Answer 8

False

Question 9

The invention of Crooks tube led to the discovery of the proton. True or False?

Answer 9

False

Question 10

Protons are more massive than electrons. True or False?

Answer 10

True

Question 11

The existence of electrons was proven by J.J Thompson. True or False?

Answer 11

True

Question 12

Protons are more massive than electrons. True or False?

Answer 12

True

Question 13

Neutrons were the first subatomic particle to be discovered.True or False?

Answer 13

False

Question 14

The nuclei of an atomic are very dense. True or False?

Answer 14

True

Question 15

The center of the atom is called the nucleus.True or False?

Answer 15

True

Question 16

Protium,deuterium, and tritium are isotopes of carbon.

Answer 16

False

Question 17

The average atomic mass on the periodic table represent the weighed of masses of all the isotopes in each element. True or False?

Answer 17

False

Question 18

Subtracting the mass number from the atomic number of neutrons in the nucleus of an atom.True or False?

Answer 18

True

Question 19

Rutherford

Answer 19

Discovered the Nucleus is positively charged

Question 20

Chadwick

Answer 20

Discovered neutrons

Question 21

Crookes

Answer 21

Generated cathode rays

Question 22

Thompson

Answer 22

Discovered the fundamental united of charge.

Question 23

Faraday

Answer 23

Named electrically charged atoms

Question 24

Democritus

Answer 24

first used the term atoms

Question 25

The symbol for atomic number is?

Answer 25

Z

Question 26

The mass of an individual atom can be determined using a mass_

Answer 26

Spectrometer

Question 27

What element from the periodic table has a mass approximately 4 times that of carbon 12?

Answer 27

I