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Atoms Review Core Flashcards | StudBud
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Atoms Review Core
Atoms Review Core
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Questions
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Answers
1
How many PROTONS does Carbon-13 have?
6
7
13
5
2
How many electrons does Li
+1
have?
2
4
3
1
3
To calculate the mass # you add Protons and Neutrons
False
True
4
Isotopes are atoms of the same element with DIFFERENT numbers of ELECTRONS
True
False
5
Which part of the atom did JJ Thomson discover using the cathode ray tube?
Protons
Nucleus
Electrons
Neutrons
6
Who described the atom as a "marble-like" sphere?
Democritus
Schrodinger
Dalton
Rutherford
7
The atomic number (Z) is equal to what?
atomic mass
mass number
protons
neutrons
8
Niels Bohr created the Planetary Model ( Similar to planets circling the sun)
False
True
9
What element has 21 protons?
Sulfur (S)
Calcium (Ca)
Scandium (Sc)
Neon (Ne)
10
John Dalton recorded 4 postulates to make the "First Atomic Theory", but 2 of the postulates were later proved wrong.
False
True
11
The mass # IS found on the periodic table.
True
False
12
What number is written at the end of hyphenated notation? Ex: Chlorine-37
Protons
Atomic #
Neutrons
Mass #
13
If an element has 9 protons and 7 electrons what is its charge?
Neutral (No charge)
-2
+1
+2
14
The atomic number (Z) is equal to what?
protons
neutrons
mass number
atomic mass
15
Rutherford used which of the following to discover the Nucleus and that the atom has lots of empty space?
Cathode Ray Tube
Planetary Model
Quantum Mechanical Model
Gold Foil Experiment
16
If an cation has a charge of +3, what happened to its electrons?
It LOST three electrons
Nothing
It GAINED three electrons
17
Ions form when an atom __________.
Loses or gains neutrons
Loses or gains electrons
Bonds with another atom
Becomes unstable
18
Which model was Schrodinger responsible for creating
Electron Cloud Model
Plum Pudding Model
Gold Foil Model
Planetary Model
