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7.2 The Atom Flashcards | StudBud
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7.2 The Atom
7.2 The Atom
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7.2 Atomic Theory #science #atomictheory
Flashcards
25 cards
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Questions
25
Answers
1
Where are electrons located in an atom?
electron cloud
neutron
who knows?!
nucleus
2
The OPPOSITE of an ELEMENT is a COMPOUND
True
False
3
There are approximately ___ different
naturally occurring
elements that have been identified.
75
25
90
50
4
How many Protons are in the nucleus of an atom of Einsteinium? Es
100
99
92
50
5
Which of the Subatomic Particles was discovered 1st
Nucleus
Electron
Proton
Neutron
6
The _________ is the very dense center of an atom that contains the protons and neutrons.
atom
element
nucleus
table
7
Which of the Subatomic particles was discovered 2nd?
Cell
Proton
Electron
Neutron
8
How many ELECTRONS does Magnesium have?
13
24
36
12
9
What is the name of the positively charged particle found in the center of the atom?
nucleus
electron
proton
neutron
10
An ELEMENT is made out of only
1
type of atom.
True
False
11
Which Subatomic Particle was discovered LAST
Electron
Neutron
Proton
Molecule
12
Current Atomic Theory suggests that the electrons move within an area around the nucleus called
Atomic Number
Electron Cloud
Atomic Mass
Period Table
13
The ATOMIC NUMBER is the number of ________ in an atom
Protons
Air
Neutrons
Electrons
14
What number defines the atom?
Mass Number
Atomic Mass
Neutrons
Atomic Number
15
Which subatomic particle is the lightest (i.e. least massive)?
neutron
nucleus
proton
electron
16
Smallest particle into which an element can be divided and still be the same element
neutron
proton
atom
electron
17
Who described the atom as a spherical ball?
Bohr
Dalton
Rutherford
Einstein
18
An ELEMENT CAN BE a COMPOUND
True
False
19
Think about a wooden chair and a balloon. What do these 2 objects have in common?
both are made of atoms
both have the same atomic mass
both have the same atomic number
both are made of the same atoms
20
Hydrogen (H
2
) is an ELEMENT
AND
a MOLECULE
False
True
21
Where are neutrons located in an atom?
empty space
electron cloud
nucleus
outer edge
22
Atoms want to stay balanced so the number of __________ is equal to the number of ______
Atoms/Elements
Neutrons/Electrons
Protons/Electrons
Protons/Neutrons
23
Where are protons located in an atom?
outside edge
nucleus
electron cloud
empty space
24
Most of an atom is
electrons
protons
empty space
neutrons
25
Which TWO particles equal the Mass Number? The Atomic Mass is also the
Mass of the Nucleus.
Protons, Electrons and Neutrons
Protons and Neutrons
Protons and Electrons
Electrons and Neutrons
