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ERMS16- 8th grade science: ch. 2 Flashcards | StudBud
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ERMS16- 8th grade science: ch. 2
ERMS16- 8th grade science: ch. 2
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8th grade ch. 2
Flashcards
18 cards
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Practice quiz
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Questions
18
Answers
1
What is the unit for the mass of a proton?
grams
atomic weight
milligrams
atomic mass unit
2
Who came up with name of the atom?
Democritus
Dalton
Rutherford
Bohr
3
The number of protons in the nucleus.
atomic symbol
atomic number
atomic bomb
atomic mass
4
Which scientist discovered the electron?
Thomson
none of the above
Democritus
Dalton
5
What did the Bohr model state about electrons of atoms?
electrons move in definite path around nucleus
both a & b
paths of electrons were certain distances from the nucleus
electrons moved randomly around the nucleus and through it
6
What is the sum of the protons and neutrons?
mass core
any of the above
mass number
subatomic mass
7
Sodium has an atomic number of 11 and an atomic mass of 23. How many electrons?
10
13
12
11
8
Sodium has an atomic number of 11 and an atomic mass of 23. How many neutrons?
11
10
12
13
9
Particles that are smaller than the atom.
nothing is smaller than an atom
subatomic particles
electronic parts
isotope
10
What is
NOT
contained in the nucleus of an atom?
electron
all of the above
neutron
proton
11
The modern atomic theory states that electrons are arranged in _____?
electron orbits
energy levels
electron clouds
energy loads
12
What did Rutherford's model propose?
the nucleus was where all of the atomic mass is located
the nucleus of an atom was positively charged
the overall charge of an atom was negative
all of the above
13
Which is NOT a force within an atom?
neutral
strong
weak
electromagnetic
14
If Carbon has an atomic number of 6, how many protons does it have?
8
6
not enough information
12
15
What are atoms with the same number of protons but different number of neutrons called?
electromagnetic
subatomic
isotope
quark
16
The small, heavy center of an atom is ....?
nucleic
nuclear
nucleus
none of the above
17
The Wave Model combined the work of Rutherford and Bohr.
false
true
18
Which is true of Dalton's Model?
all elements are made of atoms
atoms of the same element are exactly alike
all of the above
atoms of the different elements are different
