Neets Module 1

Front 1

Matter is defined as?

Back 1

anything that occupies space and has weight

Front 2

a substance which cannot be reduced to a simpler substance by chemical means is called?

Back 2

an element

Front 3

When two or more elements are chemically combined, the resulting substance is called a?

Back 3

Compound

Front 4

What do you call a combination of elements and compounds, not chemically combined, that can be separated by physical means?

Back 4

A mixture

Front 5

A ______ is a chemical combination of two or more atoms

Back 5

MOLECULE

Front 6

An _____ is the smallest particle of an element that retains the characteristics of that element.

Back 6

atom

Front 7

The atomic number of an atom is determined by the number of _____ in its nucleus.

Back 7

protons

Front 8

What are the three types of subatomic particles, and what are their charges?

Back 8

Proton - positve
Electron - negative
Nuetron - no charge

Front 9

What determines the valence of an atom?

Back 9

The number of electrons in the outermost shell

Front 10

What does the valence of an atom determine?

Back 10

its ability to gain or lose an electron

Front 11

When the atom loses electrons or gains electrons in the process of electron exchange, it is said to be _____.

Back 11

Ionized

Front 12

For ionization to take place, there must be a transfer of energy which results in?

Back 12

change in the internal energy of the atom

Front 13

ionization is the process by which an atom loses or gains ______.

Back 13

electrons

Front 14

all elements of which matter is made may be placed into one of three categories:

Back 14

conductors, semi-conductors, insulators

Front 15

______ are elements which conduct electricity very readily

Back 15

conductors

Front 16

_______ have an extremely high resistance to the flow of electricity

Back 16

insulators

Front 17

What theory states that all matter is composed of atoms and the atoms are composed of smaller particles called protons, electrons, and neutrons?

Back 17

The Electron Theory

Front 18

Which electrons are the easiest to break loose from their parent atom?

Back 18

Valence Electrons

Front 19

What is one of the easiest ways to create a static charge?

Back 19

Friction

Front 20

A static charge is more easily created between ______.

Back 20

nonconducting materials

Front 21

When two bodies of matter have unequal charges and are near one another, an electric force is exerted between them because of their unequal charges. However, since they are not in contact, their charges cannot equalize. The existence of such an electric force, where current cannot flow, is referred to as _______?

Back 21

Static Electricity

Front 22

Since ions are actually atoms without their normal number of electrons, it is the ___________________ in a substance that determines its charge

Back 22

excess or the lack of electrons

Front 23

Which law states that charged bodies attract or repel each other with a force that is directly porportional to the product if thier individual charges, and is inversely porportional to the square of the distance between them

Back 23

Coulomb's Law

Front 24

The space between and around charged bodies in which their influence is felt is called an ______.

Back 24

Electric field of force

Front 25

Magnetism is generally defined as?

Back 25

that property of a material which enables it to attract pieces of iron

Front 26

What are magnetic materials?

Back 26

They are materials that are attracted by a magnet and have the ability to become magnetized.

Front 27

An alloy is made from combining two or more elements, one of which must be a _____.

Back 27

Metal

Front 28

The most important group of materials connected with electricity and electronics are the __________.

Back 28

ferromagnetic materials

Front 29

Ferromagnetic materials are those which are?

Back 29

relatively easy to magnetize, (such as iron, steel, cobalt, and the alloys Alnico and Permalloy)

Front 30

Magnets produced from magnetic materials are called?

Back 30

Artificial Magnets

Front 31

Artificial magnets are usually classified as ______ or _______, depending on their ability to retain their magnetic properties after the magnetizing force has been removed.

Back 31

Artificial magnets are usually classified as PERMANENT or TEMPORARY, depending on their ability to retain their magnetic properties after the magnetizing force has been removed.

Front 32

Magnets made from substances, such as hardened steel and certain alloys which retain a great deal of their magnetism, are called ______.

Back 32

Permanent Magnets

Front 33

The opposition that a material offers to the magnetic lines of force is called _________.

Back 33

reluctance

Front 34

The amount of magnetism which remains in a temporary magnet is referred to as its _________.

Back 34

risidual magnetism

Front 35

If a bar magnet is suspended freely on a string, it will align itself in a _____ and _____direction.

Back 35

If a bar magnet is suspended freely on a string, it will align itself in a NORTH and SOUTH direction.

Front 36

The north pole of a magnet will always be _______ to the south pole of another magnet and will show a _______ to a north pole.

Back 36

The north pole of a magnet will always be ATTRACTED to the south pole of another magnet and will show a REPULSION to a north pole.

Front 37

The law for magnetic poles is:

Back 37

Like poles repel, unlike poles attract.