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Ch. 4 (Atomic Structure) Flashcards | StudBud
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Ch. 4 (Atomic Structure)
Ch. 4 (Atomic Structure)
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1
How many NEUTRONS does (Lithium-8) have?
7
3
8
5
2
The weighted average of all naturally occurring isotopes of an element.
isotopic notation
atomic number
mass number
atomic mass
3
What was JJ Thomson's model of the atom called?
Billard ball model
Plum pudding model
Nuclear model
Quantum mechanical model
4
Which of the following is the identity of an atom?
number of protons & electrons
mass number
atomic number
atomic mass
5
What is the MASS of (Lithium-8)?
5
3
7
8
6
Which of the following would be an isotope of oxygen?
1710 O
178 O
189 O
167 O
7
Positively charged subatomic particle; located in the nucleus
NEUTRON
ELECTRON
PROTON
8
Which particle has the smallest mass?
electrons
they are all equal mass
protons
neutrons
9
The center of an atom; made up of PROTONS and NEUTRONS
Valence electrons
Nucleus
Energy orbital
Atomic number
10
Protons + Neutrons in the nucleus of the atom.
Electric Force
Atomic #
Mole
Mass #
11
Which of the following is not a true scientist because no experimentation was conducted regarding atomic theory?
John Dalton
JJ Thomson
Ernest Rutherford
Greek philosophers
12
What experiment resulted in the discovery of the ELECTRON?
Cathode ray
Gold foil
Cutting atoms in half (thought experiment)
all are correct
13
An atom with the same proton #, but different neutron #
atomic mass
atomic mass unit
molar mass
isotope
14
Rutherford's most surprising observation about the alpha particles shot into gold foil...
most went straight through
they bend toward the negative plate
most bounced straight back
they bent toward the positive plate
15
Lithium's atomic mass is 6.94 amu means there are isotopes with this exact mass in nature.
False
True
16
How many ELECTRONS does (Lithium-8) have?
5
8
7
3
17
How many PROTONS does (Lithium-8) have?
8
7
3
5
18
An atom is neutral because it contains equal amounts of what 2 particles?
neutrons & electrons
protons & electrons
neutrons & protons
19
# of protons in the nucleus of the atom
Mass #
Unified atomic mass unit
Atomic #
Molar mass
20
Which particle/s contribute to the overall atomic mass of the element (amu)?
protons, neutrons, electrons
electrons
electrons & protons
protons & neutrons
21
Which of the following does the atomic number represent?
electrons only
protons & electrons
protons, neutrons & electrons
protons only
22
Negatively charged subatomic particle
NEUTRON
PROTON
ELECTRON
23
Which scientist discovered the ELECTRON?
John Dalton
Ancient Greeks
Ernest Rutherford
JJ Thomson
