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Chemistry Review 8th grade NC Flashcards | StudBud
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Chemistry Review 8th grade NC
Where are metalloids on the periodic table?
Who created the modern periodic table?
Chemistry Review 8th grade NC
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Periodic Table
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Questions
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Answers
1
Who created the modern periodic table?
Darwin
Mendeleev
Einstein
Newton
2
Where are metalloids on the periodic table?
group 18
left of stair step line
right of stair step line
On the stair step line
3
How many atoms of Hydrogen are in 3H
2
SO
4
?
6
3
1
2
4
The large numbers in front of molecules in a written chemical reaction are called
dot coms
sums
coefficiencts
subscripts
5
The elements in a group have the same ____________
discoverer
atomic number
symbol
properties
6
Halogens are in group ____ on the periodic table
2
18
1
17
7
Vertical (up and down) columns on the periodic table are called?
groups
periods
families
either groups or families
8
_______________ __________ will not react
halogens
alkali metals
noble gases
transition metals
9
Substances that go into a chemical reaction are called the ____________.
starters
products
reactants
finishers
10
Horizontal rows on the periodic table are called _______________?
periods
columns
groups
families
11
What is your favorite 8th grade class?
math
language arts
social studies
Science
12
When the products of a reaction weigh less than the reactants _________ was probably lost.
gas
energy
heat
identity
13
What does ductile mean?
can be pulled into a wire
can be bent
can be burned
can be boiled
14
Which of the following is NOT evidence of a chemical reaction?
color change
melting
temperature change
New substance formed
15
2Na + Cl
2
------> ____NaCl What number should go in the blank to balance the equation?
1
3
4
2
16
SnCl
2
+ 2FeCl
3
----------> 2FeCl
2
+ SnCl
4
How many atoms of Cl are in the products?
4
2
8
6
17
What does malleable mean?
Can be pulled into a wire
conducts electricity
Can be bent
can be burned
18
Can we create matter in the chemistry lab?
yes
sometimes
only if gas is produced
no
19
The periodic table is arranged by
symbols
atomic mass
atomic number
names
20
The small lower numbers in a written chemical reaction are called
subscripts
dot coms
sums
coefficients
21
Which of these is a NOT chemical reaction?
rusting
burning
melting
baking
22
What element is very important to the function of electronic devices
nitrogen
neon
silicon
carbon
23
Noble gases are in group _____ on the periodic table.
1
18
2
17
24
Which of these is a chemical reaction?
rusting
melting
freezing
boiling
25
Alkali metals are in group _______ on the periodic table.
2
1
17
18
26
When an experiment is done in a way that nothing can escape, it is called
apparatus
safe
ductile
closed system
27
Metals are to the ______________ of the stair step line
left
bottom
top
right
28
What is the most important evidence of a chemical reaction?
temperature change
Color change
Gas formation
New substance formed
