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Science > Atoms > Flashcards

Atoms Flashcards

1
Q

The part of an atom that carries a positive charge

A

Protons

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2
Q

The number of electrons that can be held in the first orbit (closest to the nucleus)

A

Two

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3
Q

The number of electrons that can be held in the third orbit

A

Eighteen

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4
Q

The part of an atom that carries a negative charge

A

Electron

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5
Q

The number of electrons that can be held in the second orbit

A

Eight

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6
Q

There are the same number of these two particles in a atom

A

Protons and electrons

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7
Q

The atomic number is the same as the number of these particles

A

Protons

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8
Q

The mass of subatomic particles is measured in _____

A

AMU’s

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9
Q

The _______ _______

Tells the number of protons in the nucleus of an atom

A

Atomic number

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10
Q

The mass number of an element is the sum of its _______ and _______

A

Protons and neutrons

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11
Q

Atoms of the same element that have a different number of neutrons are called ______

A

Isotopes

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12
Q

The _____ ______ is the space around the nucleus where electrons can be found

A

Electronic cloud

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13
Q

A ______ is a subatomic particle that makes up protons and neutrons

A

Nucleus

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14
Q

Different isotopes of an element will have different ______ _______ _______

A

Numbers of neutrons

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15
Q

Electrons in an electron cloud are arranged into _______ _______

A

Energy levels

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16
Q

The ______ _______ of an element is the average of all of the mass numbers of the isotopes of that element

A

Atomic mass

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17
Q

Protons, neutrons, and electrons are examples of ______ _________

A

Subatomic particles

18
Q

Protons have a mass of ___ Amu

A

1 amu

19
Q

Electrons have a mass of _______ amu

A

1/1836 amu

20
Q

A neutron has a mass of _______ amu

A

1 amu

21
Q

A neutron has a _______ charge

A

Neutral

22
Q

Particle that makes up all other known particles in the nucleus of an atom

A

Quark

23
Q

Force of attraction or repulsion between particles in an atom

A

Electromagnetic force

24
Q

Force that binds protons and neutrons in the nucleus

A

Strong force

25
Q

Force that is key to the power of the sun and responsible for the process known as radioactive decay

A

Weak force

26
Q

Force of attraction between all objects in the universe

A

Gravity

27
Q

The number of protons in the nucleus of an atom is the ______ ________

A

Atomic number

28
Q

Democritus concluded that you couldn’t keep dividing matter forever, eventually the smallest would be obtained and he called it the ______

A

Atom

29
Q

The small, heavy center of the atom is the _____

A

Nucleus

30
Q

The scientist J.J Thompson discovered the ______

A

Electron

31
Q

Particles smaller than the atom are called ______

A

Subatomic particles

32
Q 
The nucleus of an atom contains
A. Protons and electrons
B. Neutrons and electrons
C.protons, neutrons, and electrons
D. Protons and neutrons
A

D. Protons and neutrons

33
Q

The number of protons in an atom with an atomic number of 18 is

A. 10
B. 36
C. 18
D.8

A

C.18

34
Q

Which of the following forces within the atom is responsible for keeping electrons in orbit around the nucleus

A.electromagnetic
B. Weak
C. Gravity
D. Strong

A

A. Electromagnetic

35
Q

All nuclear particles are thought to be made of a combination of three

A. Electrons
B. Quarks
C. Isotopes
D. Molecules

A

B. Quarks

36
Q 
The arrangement and location of what subatomic particles determine the chemical properties of an atom
A. Protons 
B. Quarks
C. Neutrons
D. Electrons
A

D. Electrons

37
Q

Most of the mass of the atom is located in the ______

A

Nucleus

38
Q

Electrons that have the least amount of energy levels are located _______ from the nucleus

A

Closest

39
Q

In thompsons experiment , the gas in the tune gave off rays that were negatively charged particles called _______

A

Neutrons

40
Q

John dalton a theory was that matter is made of indivisible _____, or atoms

A

Particles

41
Q

The part of an atom that carries no electric charge

A

Neutrons

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