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WorksheetsAtoms and Molecules
Total questions: 47
Worksheet time: 48mins
Name
Class
Date
1.
How long did it take to develop our current theory on the atom?
a)
2 years
b)
20 years
c)
many years (hundreds)
d)
billions of years
2.
How many Oxygen (O) atoms are in C2HO8Cl2
a)
2
b)
12
c)
8
d)
5
3.
How many Hydrogen (H) atoms are in NH3O5
a)
3
b)
4
c)
5
d)
1
4.
A molecule is________
a)
a glob of gelatinous goo
b)
smaller than an atom
c)
filled with raisons
d)
more than one atom bonded together
5.
Our current theory on atoms is perfect, and will never be adjusted or changed!
a)
True
b)
False
6.
Iron is a metal that is mined from the earth. Iron metal is used to make many different things, including buildings and soup cans. Iron is made of only 1 type of atom. Iron is a/an...
a)
Atomic number
b)
Compound
c)
Element
d)
Atomic weight
7.
Carbon dioxide is abbreviated as CO2 because it is made up of 1 carbon atom and 2 oxygen atoms. Carbon dioxide is a/an...
a)
Colloid because it has carbon in it
b)
Compound because it is a molecule with more than one type of atom
c)
Atom because it is the smallest unit of carbon dioxide that exists
d)
Element because carbon and oxygen are both in the periodic table of elements
8.
Table salt, NaCl, is made of sodium and chlorine atoms. Table salt is a/an:
a)
compound
b)
element
9.
A single molecule of water contains one oxygen atom and two hydrogen atoms. Water is a/an:
a)
Element
b)
Compound
c)
Hydroid
d)
Solution
10.
Pure oxygen contains only one type of atom. Oxygen is a/an:
a)
element
b)
compound
11.
In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
12.
Exothermic reactions...
a)
Absorb energy
b)
Release energy
c)
Release Color
d)
Absorb Color
13.
In chemical reactions, the law of conservation of mass is......
a)
disobeyed
b)
not true
c)
obeyed
d)
used sometime
14.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
15.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
16.
How many elements are in H2O?
a)
1
b)
2
c)
3
d)
4
17.
How many Al atoms are in this compound? 4Al2O3
a)
2
b)
8
c)
6
d)
4
18.
___________________ are the elements or compounds that are formed in a chemical reaction.
a)
Polymers
b)
Bonds
c)
Reactants
d)
Products
19.
In a Chemical Reaction, the Law of Conservation of Mass states?
a)
Matter is present.
b)
Matter is NOT created or destroyed.
c)
Matter is created and destroyed.
20.
What is the smallest particle of matter that has the properties of that matter?
a)
atom
b)
matter
c)
molecule
d)
physical property
21.
What is anything that has mass and takes up space?
a)
atom
b)
matter
c)
molecule
d)
physical property
22.
What is a single particle of matter made up of with two or more atoms joined together?
a)
atom
b)
matter
c)
molecule
d)
physical matter
23.
What do you call the three forms that matter usually takes: solid, liquid, and gas.
a)
matter
b)
molecule
c)
physical property
d)
states of mater
24.
Which item is not made of matter?
a)
air
b)
water
c)
a pencil
d)
a shadow
25.
Which is bigger, an atom or a molecule
a)
atom
b)
molecule
26.
Which state of matter has tightly packed molecules?
a)
solid
b)
liquid
c)
gas
27.
Which state of matter has molecules that vibrate the least?
a)
solid
b)
water
c)
gas
28.
Which state of matter has molecules that vibrate the most?
a)
solid
b)
liquid
c)
gas
29.
Which state of matter has a definite shape?
a)
solid
b)
liquid
c)
gas
30.
Which of the following is not a phase of matter?
a)
Solid
b)
Liquid
c)
Ice
d)
Gas
31.
What units would you use to describe volume if you were measuring a solid?
a)
cm3
b)
cm2
c)
cm
d)
ruler
32.
What is the formula for density?
a)
mass x volume
b)
volume/mass
c)
mass/volume
d)
mass + volume
33.
Which is more dense?
a)
left cube
b)
right cube
34.
What type of elements are found on the right hand side of this table?
a)
metals
b)
nonmetals
c)
metalloids
d)
dark matter
35.
What type mixture is this?
a)
homogenous
b)
compound
c)
heterogeneous
d)
substance
36.
Which of the following is equal to 1 mL?
a)
1 cm3
b)
1 cm2
c)
1 cm
d)
1 m
37.
Which conducts electricity the best?
a)
Graphite
b)
Copper
c)
Wood
38.
Atoms are destroyed in a chemical reaction.
a)
True
b)
False
39.
What holds atoms together?
a)
Glue
b)
Bonds
c)
Hooks
d)
Magnetic forces
40.
What is the fuel for a burning candle?
a)
The wick
b)
Wax (paraffin)
41.
Exothermic reactions...
a)
Absorb energy
b)
Release energy
c)
Release Color
d)
Absorb Color
42.
In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
43.
What is a compound that contains Hydrogen and Carbon called?
a)
Cation
b)
Atomic Matter
c)
Hydrocarbon
d)
Carbon Hydroxide
44.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
I don't know, and don't want to try
d)
None of the answers are correct
45.
The blue numbers in the image below represent ________
a)
I don't know, and don't want to try
b)
coefficients
c)
subscripts
d)
none of the answers are correct
46.
In a reaction in which hydrogen reacts with oxygen to produce water, which substances are the reactants?
a)
hydrogen only
b)
oxygen only
c)
water
d)
both hydrogen and oxygen
47.
How many atoms of oxygen are represented in 2Ca(NO3)2?
a)
4
b)
6
c)
10
d)
12
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