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WorksheetsCounting Atoms/Organic Compounds!
Total questions: 84
Worksheet time: 9hrs 24mins
Name
Class
Date
1.
Element or compound?
O2
O2
a)
Element
b)
Compound
2.
Which is the correct formula for:
three hydrogen (H)
one sulfur (S)
four oxygen (O)
three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
3.
Which of the following is a compound?
a)
Co
b)
O2
c)
C
d)
CO2
4.
How many Valence Electrons does Argon have?
a)
2
b)
3
c)
8
d)
18
5.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
6.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
7.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
8.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
9.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
10.
Number of N in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
16
11.
Number of C's in 2Na₂CO₃
a)
1
b)
2
c)
3
d)
5
12.
(Element or Compound)
C2H8O
C2H8O
a)
Element
b)
Letters
c)
Numbers
d)
Compound
13.
How many Elements are in the compound C2H8O ?
a)
2
b)
1
c)
3
d)
0
14.
How many atoms are Carbon are in the compound C2H8O ?
a)
8
b)
2
c)
1
d)
11
15.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
16.
How many Magnesium are in 10MgCl2?
a)
10
b)
5
c)
20
17.
How many Nitrogen are in 2AlN?
a)
4
b)
5
c)
1
d)
2
18.
2H2 + O2 ----> 2H2O What is the product?
a)
------>
b)
2H2O
c)
2H2+ O2
19.
2H2 + O2 --------> 2H2O What is the yield?
a)
2H2O
b)
------>
c)
2H2 + O2
20.
2H2 + O2 --------> 2H2O What are the reactants?
a)
----->
b)
2H2O
c)
2H2 +O2
21.
The first energy level can hold up to how many electrons?
a)
8
b)
4
c)
2
d)
5
22.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
23.
Carbon is a ______?
a)
Element
b)
Compound
c)
Word
d)
Letter
24.
What is the atomic number?
a)
number of protons
b)
number of neutrons
25.
an electron has this charge
a)
positive
b)
negative
c)
neutral
26.
a neutron has this charge
a)
negative
b)
positive
c)
neutral
27.
An element is composed of how many types of atoms?
a)
5
b)
3
c)
1
28.
Elements that have properties of both metals and nonmetals are _____
a)
metals
b)
metalloids
c)
nonmetals
29.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
30.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
31.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
32.
How many Al's are in Al₂(SO₄)₃
a)
4
b)
12
c)
5
d)
2
33.
Number of Na's in 2Na₂CO₃
a)
1
b)
2
c)
4
d)
5
34.
Number of O in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
4
35.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
36.
How many Hydrogen are in 4H2O? Careful!
a)
6
b)
8
c)
2
d)
4
37.
How many Magnesium are in 10MgCl2?
a)
10
b)
5
c)
20
38.
How many Oxygen are in H2O?
a)
1
b)
2
c)
0
d)
4
39.
The yellow atoms are called
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
40.
In this image, the information to the RIGHT of the arrow (in BLACK) is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
41.
In this image, what are the information in red is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
42.
Read the following chemical formula: C6H12O6. How many hydrogen atoms are in the formula?
a)
12
b)
6
c)
4
43.
In the equation,
2Mg + O2 ---> 2MgO, What are the REACTANTS?
2Mg + O2 ---> 2MgO, What are the REACTANTS?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
44.
In this equation, what are the PRODUCTS?
Al + O2 --> 2Al2O3
Al + O2 --> 2Al2O3
a)
Al
b)
O2
c)
2Al2O3
45.
Which equation is balanced?
a)
3P4+O2 ---> 2P2O3
b)
P4+O2 ---> 2P2O3
c)
P4+ 3O2 ---> 2P2O3
d)
P4+ 2O2 ---> 3P2O3
46.
How many ELEMENTS are present in this compound?
Mg2As3COHNi2
Mg2As3COHNi2
a)
2
b)
4
c)
6
d)
10
47.
How many atoms of N are in this formula? Careful!
a)
1
b)
2
c)
3
d)
6
48.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number to the left of a formula.
49.
The blue numbers in the image below represent ________
a)
Charges
b)
coefficients
c)
subscripts
d)
none of the answers are correct
50.
Which of the following has the most number of O?
a)
2Mg3(PO4)2
b)
4AlPO4
c)
3Al(NO3)3
d)
15KOH
51.
How many F atoms are in this compound?
6MgF2
6MgF2
a)
2
b)
6
c)
8
d)
12
52.
N2 + H2 = NH4
a)
Balanced
b)
Unbalanced
53.
Is this balanced?...
Fe + S --> FeS
Fe + S --> FeS
a)
YES!
b)
NO!
54.
How many ATOMS of Carbon are in 3C2H4O
a)
2
b)
3
c)
4
d)
6
55.
Is this an example of an organic or inorganic compound?
a)
Organic
b)
Inorganic
56.
Organic compounds are always based on what element?
a)
hydrogen
b)
water
c)
carbon
d)
arsenic
57.
Is this an example of an organic or inorganic compound?
a)
Organic
b)
Inorganic
58.
Water is what type of compound?
a)
organic
b)
inorganic
c)
toxic
59.
Is this an example of an organic or inorganic compound?
a)
Organic
b)
Inorganic
60.
Is this an example of an organic or inorganic compound?
C56H58Cl14CuN16S4
C56H58Cl14CuN16S4
a)
Organic
b)
Inorganic
61.
Is this an example of an organic or inorganic compound?
a)
Organic
b)
Inorganic
62.
Is this an example of an organic or inorganic compound?
a)
Organic
b)
Inorganic
63.
2 or more elements chemically bonded is a
a)
compound
b)
element
c)
atom
64.
Organic or Inorganic?
a)
Organic
b)
Inorganic
65.
Organic or Inorganic?
a)
Organic
b)
Inorganic
66.
Organic or Inorganic?
a)
Organic
b)
Inorganic
67.
Organic or Inorganic?
a)
Organic
b)
Inorganic
68.
Organic or Inorganic?
a)
Organic
b)
Inorganic
69.
Organic or Inorganic?
a)
Organic
b)
Inorganic
70.
Organic or Inorganic?
a)
Organic
b)
Inorganic
71.
Organic or Inorganic?
a)
Organic
b)
Inorganic
72.
Organic or Inorganic?
a)
Organic
b)
Inorganic
73.
Which of the following elements is required in an organic compound?
a)
nitrogen
b)
oxygen
c)
carbon
d)
sodium
74.
Which of the following formulas is inorganic?
a)
CHO
b)
CH
c)
SiO
d)
CHCOOH
75.
Which compound below is Organic?
a)
C6H12O6
b)
H2O
c)
N2
d)
BaBr2
76.
Which of the following compounds is Inorganic
a)
BaBr2
b)
C21H29N2O6P3
c)
C6H12O6
d)
P3C5H3
77.
A compound that contains Carbon
a)
Organic
b)
Inorganic
c)
Element
d)
Atom
78.
A compound that contains no carbon
a)
Inorganic
b)
Organic
c)
Atom
d)
Element
79.
Ca(PO4)3OH
a)
Organic
b)
Inorganic
80.
Is C2H12O3 an organic or Inorganic Compound?
a)
Inorganic
b)
Organic
81.
Is NaCl (table salt) a Organic or Inorganic Compound?
a)
Inorganic
b)
Organic
82.
How many total atoms are in the compound C2H12O3?
a)
17
b)
15
c)
12
d)
2
83.
How many elements are represented in the compound?
Na2CO3
Na2CO3
a)
1
b)
2
c)
3
d)
4
84.
The compound PO4 is...
a)
inorganic
b)
organic
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