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LBC Unit 1 Review Chapter 1-3 Mr. B Flashcards | StudBud
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LBC Unit 1 Review Chapter 1-3 Mr. B
LBC Unit 1 Review Chapter 1-3 Mr. B
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Review Quiz for unit 1 of Angelica Stacy's Living by Chemistry
Flashcards
30 cards
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Practice quiz
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Host live
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Questions
30
Answers
1
Which of these statements is true about most elements on the periodic table?
They are nonmetals
They have the same number of electrons
They are solids
They are brittle
2
Which of the following elements is most reactive?
iron, #26 Period 4 Group 8
sodium
cesium
aluminum
3
What is the expression for finding volume from the mass and density of an object?
D = m/V
V = m/D
V = mD
V = D/m
4
What type of change is seen here?
chemical change
physical change
5
A filament for a light bulb must conduct electricity. Which element could be useful for this?
Carbon, C, a nonmetal
Sulfur, S, a nonmetal
Tungsten, W, a metal
neon, Ne, a noble gas
6
What is the only way to change one element into another?
Change the number of neutrons
Change the number of protons
Change the number of electrons
It cannot be done
7
Isotopes of the same element have different atomic numbers.
True
False
8
Which of the following elements is a metal?
magnesium
phosphorus
silicon
sulfur
9
Iron: atomic#: 26. What is the period number?
4
8
26
11
10
Who developed the modern periodic table?
Thomson
Einstein
Rutherford
Mendeleyev
11
In the terminology "uranium-235" what does the 235 stand for?
atomic number
number of electrons
number of protons + neutrons
number of neutrons
12
What would you expect to see in a bottle labelled "CuSO
4
(aq)"
A blue solution
A colorless gas
A fire!
A blue solid
13
What tool would measure volume most accurately?
test tube
Erlenmeyer flask
Beaker
graduated cylinder
14
Which of the following elements has the largest atomic mass?
Chromium element #24
Argon element #18
Sodium element #11
Lead element #82
15
Which has the greater density? Block 1: 15 g of gold. Block 2: 50 g of gold
Block 2
Both have the same density
Block 1
Not enough info given
16
Which of the following elements is a liquid at room temperature?
helium (He)
mercury (Hg)
iron (Fe)
strontium (Sr)
17
Which of the following is an example of matter?
thought
none of these
wind
cloud
18
What does the symbol "aq" stand for?
aqueous solution
aqua color
aquarium water
There is no such symbol in chemistry
19
An atom of lithium, atomic number 3, has a mass number of 7. How many neutrons are present?
3
7
4
6.9
20
What does the atomic number indicate (tell us) about an atom when it is neutral?
Number of neutrons
Number of atoms
Number of protons
Number of protons + number of electrons
21
What is the easiest method for measuring the volume of an irregular shaped object?
by chopping it into 1 cm3 blocks
displacement of water
by visual inspection
by measuring length width and height
22
The copper cycle experiment demonstrated what property?
Conservation of matter
Copper does not react
Copper is neat!
Copper = rust
23
Which of the following is an intensive property?
color
mass
length
volume
24
Who developed the solar system model of the atom?
Thomson
Dalton
Rutherford
Bohr
25
What is the average atomic mass for silicon? Silicon-28 (92%), Silicon-29 (5%), and Silicon-30 (3%)
28.11 amu
20.0855 amu
29 amu
28 amu
26
Which element reacts like P (period 3, group 15), but has a greater atomic mass?
Si (period 3, group 14)
N (period 2, group 15)
S (period 3, group 16)
As (period 4, group 15)
27
Why are noble gases called noble gases?
They are royalty
seemed like a nice name
They do not react with other elements
They give up all their valence electrons
28
CuO (s) is an example of ___________.
a mixture
a compound
a solution
an element
29
What is different about the three different isotopes carbon-12, carbon-13, and carbon-14?
the mass of the atom
the number of electrons
the number of neutrons
the number of nuclei
30
There are 3 isotopes of Neon, Ne-20, Ne-21, & Ne-22. Which is most abundant?
Ne-22
All the same abundance
Ne-20
Ne-21