Physical Science BJU Chapter 3

Question 1

The Bohr Model suggests that electrons move

Accepted Answer

only in distinct, spherical orbits at fixed distances from the nucleus

Question 2

Which of the following is a weighted average?

Accepted Answer

atomic mass

Question 3

_____________ developed the nuclear model

Accepted Answer

Ernest Rutherford

Question 4

Current atomic models show that electrons travel in distinct , spherical orbits around the nucleus.

Accepted Answer

False

Question 5

JJ Thomson discovered the existence of the _____________.

Accepted Answer

electron

Question 6

Democritus suggested that matter

Accepted Answer

existed in the form of very small, indivisible particles

Question 7

the total number of particles found in the nucleus of a given element

Accepted Answer

mass number

Question 8

_______________ first suggested that elements are made of atoms and that atoms of an element are alike

Accepted Answer

john dalton

Question 9

This subatomic particle is found in the nucleous and has no electrical charge

Accepted Answer

neutron

Question 10

____________ discovered electrons using Crookes tubes

Accepted Answer

JJ Thompson

Question 11

Hantaro Nagaoka developed the plum pudding model

Accepted Answer

False

Question 12

Ernetst Rutherford developed the Saturnian Model

Accepted Answer

False

Question 13

Which of the following is NOT a reason that the Bohr model is still in widespread use today?

Accepted Answer

its the most workable model to date

Question 14

The subatomic particel has a charge of +1e

Accepted Answer

proton

Question 15

What is the currently accepted model of the atom?

Accepted Answer

the quantum mechanical model

Question 16

___________believed that electrons move through spherical regions located a fixed distance from the nucleus.

Accepted Answer

Niels Bohr

Question 17

An anion has more ____________ than ______

Accepted Answer

electrons, protons

Question 18

Experiments involving ___________ lead to the discovery of the nucleus.

Accepted Answer

alpha particles and gold foil

Question 19

The law of electrostatic charges states that

Accepted Answer

both a & b are true

Question 20

What is JJ Thomson's atomic model called?

Accepted Answer

the plum pudding model

Question 21

Democritus thought of the indivisible " atomos"

Accepted Answer

True

Question 22

This Subatomic particle has a charge of -1e

Accepted Answer

electron

Question 23

The quantum mechanical model is not the primary model used today by scientists.

Accepted Answer

False

Question 24

With which of these statements would John Dalton have disagreed?

Accepted Answer

atoms can de divided into protons, neutrons and electrons

Question 25

Carbon -14 and Carbon -12 have differnt numbers of neutrons.

Accepted Answer

True

Question 26

The number of protons found in the nucleus of a given element.

Accepted Answer

atomic number

Question 27

Which of the following is NOT typically represented with whole number?

Accepted Answer

atomic mass

Question 28

John Dalton thought that atoms are indivisible and cannot be destroyed.

Accepted Answer

True

Question 29

Quantum Mechanics deals with the behavior of matter and energy at the atomic and subatomic levels.

Accepted Answer

True

Question 30

Quantum mechanics is a branch of physics that deals with __________.

Accepted Answer

matter and energy at atomic and subatomic levels

Question 31

Most of an atom consits of filled space

Accepted Answer

False

Question 32

Aristotle first called particles atomos, from which we get our word atom.

Accepted Answer

False

Question 33

Potassium -39 and potassium -41 always have the same number of ___________.

Accepted Answer

protons

Physical Science BJU Chapter 3

Questions 33

Physical Science BJU Chapter 3

Questions 33