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M3 > 3.1 Electron Theory > Flashcards

3.1 Electron Theory Flashcards

1
Q

A neutron has.
A. the opposite charge to an Electron but half the weight of a proton.
B. the same charge as an Electron but half the mass. C. no electrical charge but will add weight to the nucleus

A

No electrical charge but will add weight to the neucleus

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2
Q

The unit which consists of two or more different types of atoms is known as a.
A. particle of an element.
B. molecule of a compound.
C. molecule of an element

A

Molecule of an compound

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3
Q

In what equipment is a photon radiated when an electron leaves a hole?.
A. Photo-cell.
B. LED.
C. Photo diode

A

LED

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4
Q

A good electrical insulating material will contain.
A. Only a small number of electrons in the outer shell of each atom of the material.
B. strongly bound electrons in the atoms of the material.
C. Weakly bound ‘free’ electrons in the atoms of the material

A

Strongly bound electrons in the atoms of the material

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5
Q

The smallest particle that a substance can be split and show the same properties as the whole is known as.
A. an Element.
B. a Molecule.
C. an Atom

A

Atom

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6
Q

What charge does the nucleus of an atom possess?.
A. Positive.
B. Neutral.
C. Negative.

A

Positive

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7
Q

What is the maximum number of electrons in shell N of an atom?.
A. 18.
B. 32.
C. 16.

A

32

Shell k = 2 electrons, shell L= 8 electrons, shell M = 18 electrons and shell N = 32 electrons

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8
Q

An oxygen molecule is made up of
A. two oxygen atoms sharing neutrons.
B. two oxygen atoms sharing protons.
C. two oxygen atoms sharing electrons

A

Two oxygen atoms sharing neutrons

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9
Q

If electrons are added to an atom it becomes.
A. a neutral ion.
B. a positive ion.
C. a negative ion.

A

Negative ion

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10
Q

An element whose atoms have fewer than 4 electrons in their valency shell are.
A. semiconductors.
B. good insulators.
C. good conductors

A

Good conductors

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11
Q

The charge on a proton is.
A. positive.
B. negative.
C. neutral

A

Positive

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12
Q

What effect do the electrons of one atom have upon the electrons of another atom?.
Option A. They have no effect on each other.
Option B. They repel each other.
Option C. They attract each other

A

They repel each other

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13
Q

What is a molecule?.
Option A. The smallest part of an atom.
Option B. The smallest part of a compound.
Option C. The smallest part of an electron

A

Smallest part of a compound

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14
Q

An atom is.
Option A. the smallest part of an element that retains its characteristics.
Option B. the smallest part of a compound that can exist independently.
Option C. the smallest particle of matter

A

the smallest part of an element that retains its characteristics

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15
Q

A neutron is a particle which is.
Option A. is contained in the nucleus of all atoms.
Option B. orbits the nucleus of the atom.
Option C. is contained within the nucleus of most atoms

A

Is contained within the nucleus of most atoms

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16
Q

The mass of an atom is contained mainly in the.
Option A. proton.
Option B. nucleus.
Option C. electron

A

Nucleus

17
Q

When an atom loses or gains an electron it is called.
Option A. a molecule.
Option B. a current.
Option C. an ion

A

An ion

18
Q

A good electrical insulator is a material which.
Option A. contains a large number of positive ions.
Option B. has its electrons tightly bound to their parent atoms.
Option C. has more protons than electrons

A

Has it’s electrons tightly bound to its parent atoms

19
Q

An electric current is.
Option A. an ordered flow of electrons.
Option B. a surplus of free electron.
Option C. an excitement of electrons in a metal

A

An ordered flow of electrons

20
Q

An atom contains.
Option A. hydrogen.
Option B. molecules.
Option C. electrons

A

Electrons

21
Q

Germanium and silicon have how many electrons in their outer shell?.
Option A. 6.
Option B. 4.
Option C. 2

A

4

All semiconductors (including carbon) have 4 electrons in their outer shell

22
Q

If a free electron is given to another atom, that atom is a.
Option A. valency atom.
Option B. negative ion.
Option C. positive ion

A

Negative ion

23
Q

The atomic number of an atom is determined by the number of.
Option A. protons.
Option B. electrons.
Option C. neutrons

A

Protons

24
Q

The valence electron is.
Option A. the electron in outer shell of atom.
Option B. the electron in inner shell of atom.
Option C. a positive electron

A

The electron in the outer shell of an atom

25
Q

An atom with a deficiency in electrons has.
Option A. low resistance.
Option B. high resistance.
Option C. high impedance

A

Low resistance

26
Q

An atom with less than 4 electrons in its outer shell has.
Option A. low electrical resistance.
Option B. no electrical resistance.
Option C. high electrical resistance

A

Low electrical resistance

27
Q

Elements such as phosphorus with 5 electrons in their outer shell, when combined with pure silicon, is a.
Option A. isotopic.
Option B. acceptor.
Option C. donor

A

Donor

28
Q

An hydrogen atom consist of a.
Option A. Proton, Neutron and an Electron.
Option B. Proton and an Electron only.
Option C. Neutron and a proton only

A

Proton and Electron only

29
Q

For an atom to become a negative ion it must.
Option A. gain at least one electron.
Option B. have undergone ionisation by the sun.
Option C. lose at least one electron

A

Gain at least one electron

30
Q

What is the maximum number of electrons in shell M of an atom?.
Option A. 18.
Option B. 6.
Option C. 16

A

18

31
Q

A neutral atom with an atomic no. of 3 has how many electrons?.
Option A. 1.
Option B. 3.
Option C. Dependant on type of atom

A

3

32
Q

The nucleus of an atom is.
Option A. neutral.
Option B. positive charged.
Option C. negative charged

A

Positive charged

33
Q

Electron orbits are called.
Option A. waves.
Option B. shells.
Option C. valences

A

Shells

34
Q

A neutral atom gains electrons.
Option A. It gains a positive charge.
Option B. It gains a negative charge.
Option C. It remains neutral

A

It gains negative charge

35
Q

An oxygen atom has.
Option A. protons and electrons.
Option B. neutrons and protons.
Option C. protons, neutrons and electrons

A

Protons, neutrons and Electrons

M3 (6 decks)

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