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7th Grade Balancing Equations and Elements 13-16 Flashcards | StudBud
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7th Grade Balancing Equations and Elements 13-16
7th Grade Balancing Equations and Elements 13-16
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7th Grade Balancing Equations Periodic Table 13 - 16
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Questions
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Answers
1
H + O → H
2
O (which side is the product side)
The side before the arrow
The side after the arrow
2
___NaOH + ___H
2
SO
4
→ ___Na
2
SO
4
+ ___H
2
O (one last practice)
2, 1, 1, 2
2, 5, 2, 1
1, 5, 3, 1
2, 6, 4, 1
3
___ NaCl + ___ BeF
2
→ ___ NaF + ___ BeCl
2
(Solve)
1, 2, 1, 2
1, 2, 1, 1
1, 1, 1, 2
2, 1, 2, 1
4
___ FeS + ___ O
2
→ ___ Fe
2
O
3
+ ___ SO
2
(Solve)
1, 3, 2, 3
1, 2, 1, 2
4, 7, 2, 4
1, 4, 1, 5
5
Which one is an example of double replacement?
A + B → AB
AB → A + B
A + BC → AB + C
AB + CD → AC + BD
6
When we add a number to a chemical equation what does it do?
divide atoms of an element
subtract atoms of an element
multiply atoms of an element
add atoms of an element
7
What is the atomic number of Aluminum?
14
13
16
15
8
Which one is an example of single replacement?
A + BC → AB + C
A + B → AB
AB → A + B
AB + CD → AC + BD
9
___ Ba
3
N
2
+ ___ H
2
O → ___ Ba(OH)
2
+ ___ NH
3
(Solve)
3, 2, 1, 6
1, 6, 3, 2
1, 3, 3, 1
1, 2, 1, 4
10
H + O → H
2
O (what does the 2 apply to)
Everything
Both the H and O next to it
Just the H in front of it
Just the O behind it
11
What is the atomic symbol of Silicon?
S
Sc
Sl
Si
12
H + O → H
2
O (which side is the reactant side)
The side before the arrow
The side after the arrow
13
Why are chemical equations good examples of the law of conservation of mass?
Because matter can't be created or destroyed
Because they must be balanced
Because they illustrate chemical reactions
14
_____H + _____O → _____H
2
O (time to balance)
2, 1, 1
2, 1, 2
2, 0, 0
Its already balanced
15
Which one is an example of synthesis or combination?
A + BC → AB + C
A + B → AB
AB + CD → AC + BD
AB → A + B
16
What are the 4 most recent elements we've covered?
Boron, Carbon, Nitrogen, Oxygen
Aluminum, Silicon, Phosphorus, Sulfur
Hydrogen, Helium, Lithium, Beryllium
Fluorine, Neon, Sodium, Magnesium
17
What is the atomic number of Phosphorus?
15
14
16
13
18
___ CH
4
+ ___ O
2
→ ___ CO
2
+ ___ H
2
O (Solve)
1, 2, 1, 2
1, 4, 2, 2
1, 2, 3, 2
1, 2, 2, 2
19
What is the atomic symbol of Sulfur?
Sr
Si
S
Su
20
Reactions can be endothermic and exothermic, what does this mean?
exothermic reactions release energy
exothermic reactions absorb energy
endothermic reactions absorb energy
endothermic reactions release energy
21
Where can we find Silicon very easily?
Clay
Sand
Silt
Gravel
22
Which one is an example of decomposition?
A + BC → AB + C
AB → A + B
A + B → AB
AB + CD → AC + BD
23
Where is Aluminum most commonly found?
Gravel
Water
Sand
Clay
24
Which allotrope of Phosphorus was incredibly reactive?
Yellow
Black
Red
White
25
What color was Sulfur?
White
Blue
Green
Yellow
26
H + O → H
2
O (what does the 2 represent)
A superscript
A coefficient
A subscript
