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2022-2023 Science Quarter 2 Test > Atoms, Periodic Table+Trends, & Atomic Model History > Flashcards

Atoms, Periodic Table+Trends, & Atomic Model History Flashcards

1
Q

according to Dalton, atoms cannot be…

A

divided

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2
Q

Which of the following is NOT part of Dalton’s theory?
- all matter is made of small particles called atoms
- hydrogen and oxygen gases will combine to make H2O
- breaking an atom is a possibility
- all atoms of a certain element are identical

A

breaking an atom is a possibility

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3
Q

who discovered negatively charged particles and what are the “negatively charged particles” called

A

Thomson - electrons

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4
Q

prior to experiments with cathode tubes, the smallest particles that made up matter were believed to be…

A

atoms

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5
Q

where are electrons located?

A

in a region outside the nucleus

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6
Q

according to Heinsberg (electron cloud model), the more accurately we know about an electron’s momentum, the less we know about its precise…

A

location

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7
Q

the scientist that discovered the particle inside the nucleus that has no electrical charge and that particle’s name

A

Chadwick - neutron

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8
Q

True/False chadwick discovered the elctron

A

false

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9
Q

which philosopher said that there were only four elements: earth, air, fire, and water

A

aristotle

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10
Q

aristotle said that everything is divided into four…

A

elements

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11
Q

who is the scientist that developed what is known as the “planetary model” of the atom?

A

bohr

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12
Q

how do electrons move in Bohr’s model of the atom

A

circular orbits around the nucleus

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13
Q

this scientist discovered that most of an atom’s mass comes from its nucleus

A

rutherford

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14
Q

what did Rutherford discover using gold foil

A

nucleus

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15
Q

which philosopher is credited with coining the term “atom”?

A

democritus

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16
Q

which of these statements is not a part of democritus’ theory of matter?
- atoms are indivisible and indestructible
- all matter is composed of breakable invisible particles
- atoms are tiny and solid particles

A

all matter is composed of breakable invisible particles

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17
Q

matter is made up of atoms with protons, neutrons, surrounded by a cloud of electrons is a…

A

THEORY

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18
Q

dalton’s view of the atom agrees with current/modern atomic theory, except for the statement that…
- atoms of different elements are different
- atoms cannot be divided
- atoms combine in specific ratios
- atoms of the same element are alike

A

atoms cannot be divided

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19
Q

the center of the atom is the…

A

nucleus

20
Q

the neutron has this sort of charge..

A

neutral

21
Q

good job

A

go take a five minute break

22
Q

which particles make up an atom

A

neutrons, protons, electrons

23
Q

what are subatomic particles with positive charge called

A

protons

24
Q

what are subatomic particles that do not contain any charge called

A

neutrons

25
Q

what are the pure substances that make up all kinds of matter and are made up of atoms

A

elements

26
Q

which unit is closest in size to the radius of an atom

A

about 1 nanometer (about one billionth of a meter)

27
Q

which particles constantly move around the nucleus

A

electrons

28
Q

do atoms of the same element have the same number of protons

A

yes

29
Q

Trillions of atoms would fit in the period at the end of this sentence. TRUE or FALSE

A

true

30
Q

what is an atom

A

the smallest part of an element that has the element’s properties

31
Q

what is ALL MATTER made of

A

atoms

32
Q

what is the atomic radius pattern on the periodic table

A

increases as you go the left and increases as you go down

33
Q

what makes up atomic mass

A

protons and neutrons (electrons have very very little mass, so it isn’t counted

34
Q

how did mendeleev place the elements according to?

A

increasing atomic mass

35
Q

elements in the same period of Mendeleev’s table have similar properties TRUE OR FALSE

A

false

36
Q

how are elements within a group/family similar

A

they have many of the same chemical properties

37
Q

do elements in a period have similar chemical properties

A

no

38
Q

what is the similarity between elements in a period

A

they have the same number of electron shells

39
Q

what is a proton’s eletrical charge

A

+1

40
Q

what is a proton’s atomic mass unit

A

1

41
Q

what is a neutron’s electrical charge

A

neutral or 0

42
Q

is a neutron’s mass+diameter similar to a proton’s

A

yes

43
Q

what is an electron’s electrical charge

A

-1

44
Q

what are electrons attracted to

A

the positive nucleus

45
Q

do electrons in lower levels have more energy than electrons at higher energy levels

A

no

46
Q

what is most matter in the universe made of

A

empty space

46
Q

what is most matter in the universe made of

A

empty space

2022-2023 Science Quarter 2 Test (10 decks)

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