Which of these ideas was part of the earliest model of the atom?
a) atoms can produce streams of charged particles
b) electrons move too fast to describe where they are located
c) neutrons are located in the same place as protons
d) atoms are hard, tiny particles like billiard balls

Option (D) is the correct answer.

Explanation:

Earliest model of the atom was given by Dalton. He stated that atoms are extremely small particles and they cannot be subdivided, created or destroyed.

He also said that for a given element, atoms have identical size, mass and other properties.

Thus, we can conclude that the idea atoms are hard, tiny particles like billiard balls was part of the earliest model of the atom.

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation:

double the distance = divide strength by 4