Chapter 4 The Stucture Of The Atom

Question 0

Aristotle

Answer 0

One of the most influential philosophers.
Wrote extensively on many subjects, including politics, ethics, nature, physics and astronomy.
Most of his writings have been lost through the ages.

Question 1

Democritus’s ideas

Answer 1

Matter is composed of empty space through which atoms move.
Atoms are solid, homogeneous, indestructible, and invisible.
Different kinds of atoms have different sizes and shapes.

Question 2

Dalton’s atomic theory

Answer 2

All matter is composed of extremely small particles called atoms.
Atoms cannot be created, divided into smaller particles, or destroyed.

Question 3

Atom

Answer 3

The smallest part of an element that retains the properties of an element.

Question 4

The Ray of radiation originated from the cathode end of the tube the, it became known as…..

Answer 4

Cathode ray.

Question 5

Electrons

Answer 5

Negatively charged particles that are part of all forms of matter.

Question 6

Nucleus

Answer 6

A tiny dense region located in the center of the atom that contained all of an atom’s positive charge and virtually all of its mass.

Question 7

Proton

Answer 7

A subatomic particle carrying out a charge equal but, opposite that of an electron.

Question 8

Neutron

Answer 8

Neutron has a mass nearly equal to that of a proton, but carries no electrical charge.