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MrDrJones Midterm review PTchem Flashcards | StudBud
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MrDrJones Midterm review PTchem
MrDrJones Midterm review PTchem
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AJHS Midterm Review - Physical Science:
Flashcards
70 cards
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Practice quiz
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Host live
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Questions
70
Answers
1
Ethanol has six hydrogen atoms, two carbon atoms and one oxygen atom Write the chemical formula
C2H6O
CH6O2
HCO6
C26HO
2
Which of the following is a physical change?
Paper burning
Baking a cake
dissolving salt in water
mixing baking soda and vinegar
3
Which statement about noble gases is correct?
They form bright compounds
They are inert
they are highly reactive with both metals and non metals.
they have great taste
4
The three branches of science include Earth Science, Physical Science and what?
Life Science
Calculus
Chemistry
Astronomy
5
Alkali metals are chemical family number.
1
17
18
2
6
All of the following elements conduct electricity. One they showed on Bill Nye. Which is NOT a metal?
Vanadium
Carbon
Iron
Lead
7
These are dissolved by solvents
Isotopes
elements
Solutes
Ions
8
Mendeleev organized elements in his table by ______
atomic mass
atomic number
reactivity
atomic density
9
____ affects the rate of a chemical reaction.
Height
Temperature
Color
Amount
10
If the number and types of atoms in a substance change when?
chemical properties stay the same physical properties change
A physical change has occured
A chemical Reaction has occurred
physical properties stay the same chemical properties change
11
In an atom, electrons ____.
are located in the nucleus
Travel outside the nucleus
Are always in the same place in an atom
Are paired with Neutrons
12
Sodium is an ion represented as Na
+
. What does the “+” represent?
Na has a tendency to lose an electron when it becomes an ion
Na has a tendency to gain an electron when it becomes an ion
positive because it takes 5 electrons to make Na neutral
"+" means it can combine with almost every element on the PT
13
____ reactions absorb energy.
Physical
Exothermic
Chemical
Endothermic
14
The energy levels of an atom are occupied by ____.
neutrons
electrons
protons
ions
15
Groups 3-12 in the middle can be held and are commonly known.
alkali metals
alkaline earth metals
transition metals
noble gasses
16
Which of the following is considered the building block of matter?
Atom
Pebble
Drop of water
Light wave
17
A single proton has which electrical charge?
Positive Charge
Either positive or a negative charge
Negative charge
No charge
18
A graph usually has the ____ variable on the X axis because its the foundation of what your testing
independent
dependent
standardized
control
19
A halogen is an element that can react with a _____ and form an ionic compound called a salt.
Solid
Sulfur
Liquid
Metal
20
A chemical bond that occurs when atoms share electrons is a(n) ____ bond.
ionic
Covalent
Magnetic
Polyatomic
21
Electrons have a ____ charge.
1 AMU charge
positive
negative
no charge
22
Protons and ____ are inside the nucleus.
neutrons
electrons
only protons
ions
23
Use the Symbols. Which is synthesis?
1
2
4
3
24
Which of the following is a molecule?
Ne (neon)
Au (Gold)
CO2 (Carbon Dioxide)
Na(Sodium)
25
Of these, which is most reactive?
Noble gases
Phalcogens
Alkali metals
Transition metals
26
Neutrons have a ____ charge.
1 AMU carge
no charge
positive
negative
27
A hydrogen atom has mass of what?
Same as water
6
1.01
1 AMU
28
Most nonmetals are ____.
good conductors
solids at room temperature
bad conductors
gases at room temperature
29
Modern chemists do, what is the primary way the PT is organized?
reactivity
atomic density
atomic number
atomic mass
30
Stainless steel, brass and bronze are all solutions of solids called
alloys
metalloids
ionics
valences
31
Elements in group 18, on the far right and are inert
Nonmetals
Transition metals
Metalloids
Noble Gases
32
The nucleus of an atom consists of _____.
Protons and neutrons
Protons, neutrons, and electrons
electrons
Neutrons
33
Use the Symbols. Which is decomposition?
3
1
2
4
34
NaCl forms bonds by swapping an electrons, so its what kind of a compound?
halogen
covalent
ionic
metallic
35
Which elements are located between the metals and the nonmetals on the periodic table?
Metalloids
Halogens
Nobel gases
Synthetics
36
You test a new vaccine to see if it helps people get better. What's the independent variable?
People get sick
Number of vaccine doses
The amount of time a person is in the hospital
People are immune
37
The horizontal portions of the periodic table are called what?
Period
Group
Family
Method
38
24.2 Kg = _ g?
100
24.2
.242
24200
39
The units for density are what?
g/cm3
m/v
l x w x h
grams
40
two atoms have the same # of protons but different #'s of neutrons, they will have the same
Atomic Number
Half-life
Mass Number
Degree of stability
41
Which of the following does NOT affect solubility of a substance?
Odor
Temperature
Polarity
The solvent
42
baking soda and vinegar were weighed and reacted. The gas and products were the same.
Law of chemical reactions
Boyles law
Conservation of mass
Charles law
43
In a chemical equation, the formulas to the left of the arrow represent the _____.
Solution
Reactants
Mixture
Products
44
The place of an element in the modern periodic table is determined by its _____.
Density
Atomic Mass
Atomic Number
Chemical Activity
45
What is group 17?
halogens
noble gasses
alkaline earth metals
alkali metals
46
The metric system is standardized on what?
Carbon
Hydrogen
Oxygen
Water
47
Which is the demo that we added copper sulfate to zinc?
4
2
3
1
48
Most metals are ____.
good conductors
brittle
gases at room temperature
solids at room temperature
49
How many dots are shown in the electron dot diagram for calcium, element number 20?
1
8
2
20
50
Approximately how many elements are metals?
1/2 of the Periodic Table
1/3 of the Periodic Table
All of the Periodic Table
3/4 of the Periodic Table
51
Which two particles would be attracted to each other?
All particles are attracted to each other
Electrons and neutrons
Electrons and protons
Protons and neutrons
52
Reactants are on the ____ and products are on the ____ of a written equation.
left, right
right, left
53
Which is a double-replacement
1
3
4
2
54
An sharing of electrons in a molecule is a ____.
bond
ion
electron
proton
55
A model that shows all the electrons in all the shells
Lewis dot
AMU
Bohr
Conservative
56
A model that shows valence electrons and you can form molecules.
Conservative
Electron dot
AMU
Bohr
57
losing or gaining an electron like Na or Cl forms a what?
a radioactive particle
An isotope
a halogen
An ion
58
Helium and most nonmetals are found in which area of the periodic table?
On the right side
on the left-most side.
In the middle column of the periodic table
the bottom rows
59
Which elements have properties of both metals and nonmetals?
Alkali Earth Metals
Alkali metals
Transition Metals
Metalloids
60
Water has what density in g/cm
3
1
0
10
100
61
The elements in the second column from the left edge of the periodic table are the _____.
Alkali Metals
Transition Elements
Lanthanide and Actinide Series
Alkaline Earth Metals
62
Which of the following statements about the atom is false?
Electrons travel in set circular pathways around the nucleus
Each atom has a tiny nucleus at its center
all atomic nuclei are positively charged
all protons and neutrons are located in the nucleus
63
The particles that make up an atom are ____.
Elements, Protons, and Electrons
Protons, Neutrons, and Nuclei
Protons, Neutrons, and Electrons
Electrons, Protons, and Nuclei
64
When oxygen is present and the reaction gives off energy, CO2 and H2O
decomposition
single replacement
synthesis
combustion
65
Which of the following is a chemical change?
A piece of paper is crumpled up
A piece of metal is bent
A piece of copper turns green
A piece of glass is scratched
66
____ are numbers on placed in front of an element or compound used to balance the equation.
Fractions
Coefficients
Superscripts
Subscripts
67
Which of the following is an indication that a chemical reaction could have occurred?
Change of color
All of the above
Heat
Bubbles
68
Most nonmetals are what state of matter?
Solid
Ions
Gas
liquid
69
Plasma is a state of matter where it has so much energy that what happens?
All atoms loose their electrons or are ionized
Graviity doesnt apply
Nuclear reactions begin to happen
Atoms become radioactive
70
What does O
-2
represent?
An anion of Oxygen
An Atom of oxygen
A molecule of oxygen
A cation of Oxygen
