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8th Grade Atom
Flashcards
40 cards
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Practice quiz
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Host live
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Questions
40
Answers
1
positively charged particles; identify the atom
Nucleus
Proton
Electron
Neutron
2
TRUE OR FALSE: Electrons are found in the nucleus of an atom
TRUE
FALSE
3
Which element is this Bohr Model representing?
Hydrogen
Carbon
Maepriceum
Helium
4
Which of these pictures (if any) show an element
C
A
B
None of them
5
The proton and electron in a Hydrogen atom stay near each other because
Two negatives make a positive
Positive and positive charges push away from each other
Positive and negative charges pull together
Positive and negative charges push away from each other
6
The particle in the nucleus that has no charge is called....
Atom
Neutron
Proton
Electron
7
Oxygen in a pure substance made up of only one kind of atom. Oxygen is an example of a(n)
Compound
Atom
Mixture
Element
8
In words, I would call 2 H
2
2 hydrogen elements
2 hydrogen compounds
2 hydrogen atoms
2 hydrogen molecules
9
TRUE OR FALSE: The sodium in Sodium Chloride (salt) acts very differently as a pure element
Yes, compounded elements act differently
Na
No, Sodium is always Sodium
10
Which of these substances contains exactly 4 atoms
HNO2 (Nitric Acid)
CH3COOH (Acetic Acid)
H2SO4 (Sulfuric Acid)
H2O (Water)
11
Which model of the atomic theory is this?
Bohr Model
Plum Pudding Model
Electron Cloud Model
Rutherford Model
12
What particle determines how atoms will bond?
Electron
Proton
Nucleus
Neutron
13
An average Boron atom has about how many neutrons?
11
10
10.811
6
14
The number of protons in an element's nucleus
atomic number
atomic symbol
atomic mass
atomic weight
15
Which of the following pictures shows a mixture of elements and compounds
X
W
Z
Y
16
Which picture (indicated by a letter in red) shows CH
4
(methane)
E
B
D
C
17
unit used for the mass of a subatomic particle, protons and neutrons each weigh one of these
Atomic Unit (AU)
Unit of Mass of proton (UMP)
Mass of atom in grams (g)
Atomic Mass Unit (AMU)
18
The elements on the right side of the periodic table (in green) are called what?
metals
metalloids
nonmetals
alkali
19
Which of these is ozone?
O3
H2O
O2
OH
20
I am an atom that consists of 2 protons, what am I?
Lithium
Hydrogen
Helium
Carbon
21
I would say [4 Co] in words as
4 Carbon Monoxide molecules
4 Cobalt molecules
4 Cobalt atoms
4 Carbon Monoxide atoms
22
Which of the following substances is made up of more than one type of atom
NO (Nitrous Oxide)
O3 (Ozone)
Ni (Nickel)
H2 (Hydrogen)
23
Which group is the least reactive because it has a full valence shell?
Alkali Metals
Transition Metals
Halogens
Noble Gases
24
The elements on the left side of the periodic table (in blue) are called what?
The metalloids
The noble gases
The nonmetals
The metals
25
As you go down a column in the periodic table, which trend is true?
The atomic mass decreases
the atomic mass increases
the atomic mass stays the same
the atomic mass sometimes increases, sometimes decreases
26
the electrons in the energy level that is farthest from the nucleus
final electrons
valence electrons
valence shell
valence energy
27
Which of these is a molecule?
2 H
H2
Hydrogen
28
Where does the atom's mass come from?
All particles in the shells
All particles in the nucleus
Electrons
Protons
29
Different atoms of the
same element
can have a different number of....
Protons
Magnetic Properties
Atomic Number
Neutrons
30
How many different KINDS of atoms are in H
2
SO
4
?
7
4
3
6
31
Elements in the same horizontal row (period) have the same....
Number of neutrons
Number of electron shells
Number of valence electrons
Atomic weight
32
How many protons are in a Zinc atom?
30
60
65.409
15
33
Which of these show a compound?
NO
Ni
H2
O3
34
Why are the elements in the left column (such as sodium) so special?
They are the noble gases
They have a full set of 8 valence electrons
They are metalloids
They are highly reactive to other elements
35
What is the atomic weight of Uranium?
92
238
238.03
92 X 2
36
Elements in the same vertical column (family/group) have the same....
Number of valence electrons
Number of neutrons
Number of Electron Shells
Atomic Weight
37
The smallest particle of an element that acts like that element is a(n)
Electron
Neutron
Atom
Element
38
An element and an atom are different but related because
An element is made up of many different kinds of atoms
A molecule is the same as an atom
An element is smaller than an atom
An element is made up of all the same kinds of atom
39
This is the center of an atom, made up of protons and neutrons.
Nucleus
Energy Levels
Valence Shell
Mitochondria
40
The elements along the zig zag line (in orange) are called what?
transition metals
nonmetals
metals
metalloids
