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Duplicate of Chemistry Flashcards | StudBud
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Duplicate of Chemistry
Duplicate of Chemistry
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#chemistry #middleschool
Flashcards
44 cards
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Questions
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Answers
1
Water is the only common substance that can be found as all 3 physical states of matter:
Solid, liquid, gas
Lakes, rivers, streams
Solid, plasma, liquid
Vapor, Solid, gas
2
A covalent bond is a bond that takes electrons from others
True
False
3
In ______ the electron is shared
Covalent
Ionic
4
Scientists recognize 92
Water elements
Atoms
Gas elements
Natural elements
5
What characteristic best describes a physical change?
Form stays the same
Mass is lost
Composition changes
Composition stays the same
6
Gases are found on which side of the Periodic table of elements
Middle
Bottom
Right
Left
7
Neutrons have a ______ charge
Positive
Neutral
Negative
8
C
2
H
5
OH is a compound that contains how many Hydrogen atoms?
7
5
6
4
9
What can not be broken down into any other substance?
Element
Atom
matter
Proton
10
Changing the number of _____ changes the element
Quarks
Protons
Electrons
Neutrons
11
In a bohrs model, the second layer can hold ______ Electrons
16
2
8
32
12
What are organisms composed of?
Beef
Atoms
Ions
Matter
13
Which of these numbers is the Coefficient? 7H
5
3
5
7
Potato
14
____ Chemistry is the study of carbon containing compounds
Inorganic
Organic
Life
Great
15
Protons have a ______ charge
Negative
Neutral
Positive
16
Electrons have a ______ charge
Neutral
Positive
Negative
17
How many total elements are there on the table of elements
38
102
92
117
18
A calorie is the amount of energy it takes to raise water _____ degrees Celsius
3
4
1
2
19
In ______ the electron is given away or taken away
Covalent
Ionic
20
Which of these is water normally found in
Solid
Dust
Plasma
Fire
21
Atoms are so small that it would take __________to stretch across this period.
one hundred milion
ten thousand
one million
one thousand
22
True or false, there is only one type of molecular shape
True
Well actually I don't know and I'd rather have a test now
False
23
Which statement is true of physical change?
Changes into a new substance
Burning is an example
More than one substance must be present
It changes shape or form of a substance
24
Organisms are composed of ________
weight
Matter
kinetic energy
cheese
25
What percentage of our cells are made of water?
40-60%
100%
70-95%
20-30%
26
CH2OH is a compound made of oxygen, hydrogen, and _______.
carbon dioxide
nitrate
carbon
sodium
27
A _________ is a substance that cannot be broken down into other substances.
Substance
Chemical
Compound
Element
28
Water is made up of
Nitrogen, Oxygen
Hydrogen, Oxygen
Oxygen, Carbon
Hydrogen, Electrons
29
How many natural elements have scientists discovered?
92
36
87
98
30
Which of these is not made of carbon
Diamond
Wood
A Gold bar
Soot
31
Water, carbon dioxide, hydrogen peroxide, and salt are all examples of....
mixtures
substances
elements
compounds
32
Water is a ____ molecule because negative attracts to positive
tetrahedral
Polar
Non-polar
Linear
33
How many electrons are on the third shell?
8
32
2
18
34
3 particles are mainly what make up atoms, they are:
Compounds, Electrons, Neutrons
Neutrons, Protons, Quarks
Protons, Electrons, Atoms
Neutrons, Protons, Electrons
35
_______means equal on both sides. Also stabilized reactions.
Coefficients
Equilibrium
Subscript
Reactants
36
Which of these numbers is the Subscript? 7H
5
7
3
5
Potato
37
What is one element that makes up 96% of living organisms?
Neon
Carbon
Boron
Helium
38
How many electrons are in Hydrogen?
8
7
1
2
39
Which of the following cannot be classified as matter?
Frozen liquid
A rock
Heat
Odorless gas
40
just 4 of the elements make up 96% of all living matter:
Carbon, Hydrogen, Nitrogen, Nickel
Carbon, Oxygen, Hydrogen, Boron
Carbon, Oxygen, Hydrogen, Nitrogen
Carbon, Oxygen, Floride, Hydrogen
41
the strongest types of bonds in chemistry are
Ionic and Covalent
Hydrogen and Ionic
Covalent and Hydrogen
peanut butter and jelly
42
In a bohrs model, the first layer can hold ______ Electrons
8
2
32
16
43
one of the properties of water is its
Covalent bonds
low specific heat
Cohesion
Strong bonds
44
A _______ cannot be broken down any further by chemical reactions
compound
Element
solvent
substance
