Phenomena: Atoms are the basic unit of matter; Atoms combine in a variety of ways to make up all types of
matter.
Name _______________________________________________________________________
Atoms and Molecules Web Quest Worksheet
1. Define Atom
2. There are _______________________________________ of atoms in your body.
3. Your body is made up of about ______________ different elements.
4. Chemistry works almost ______________ elements.
5. How many different molecules can be made with the elements?
6. Identify the three parts of an atom and identify the charge of each particle. Also, identify where
they are found.
Particle
Charge
Where Found
7. Where are electrons found?
8. The mass of these particles are almost the same.
a.
b.
9. To be electrically neutral, an atom must have and equal number of…
a.
b.
10. Atom comes from the Greek word meaning _____________________________.
11. ______________________ is the most abundant element in the universe.
~1~
Phenomena: Atoms are the basic unit of matter; Atoms combine in a variety of ways to make up all types of
matter.
12. There are about _______________________ known molecules that can be made with carbon.
13. How big is an atom?
14. Draw and label a diagram showing the structure of a atom.
15. What makes a atom stick together?
16. Define molecule.
17. The chemical symbol for sugar is C6H12O6. How many of each molecules would you have?
Element
Number of Atoms
18. What percentage of the mass of the human body is made up of oxygen atoms?
19. Molecules are made up of more than one…
a. atom.
b. electron.
c. element.
d. neutron.
e. proton.
~2~
Phenomena: Atoms are the basic unit of matter; Atoms combine in a variety of ways to make up all types of
matter.
20. What is the common name for the compound H2O?
a. Ammonia
b. Carbon dioxide
c. Glucose
d. Sugar
e. Water
21. This shows the number of atoms in a molecule.
22. Identify problems with atom models.
23. An electron is at least __________________ times smaller than a proton.
24. The entire atom is __________________ times larger than the nucleus.
25. An atom is mostly __________________________________________.
History of Atoms
26. Explain what the following people did to expand our knowledge about atoms. Include their
contribution and in which year they made their discoveries.
a) Democritus –
b) John Dalton –
c) Sir J. Joseph Thomson –
d) Ernest Rutherford –
e) Neils Bohr –
f) James Chadwick –
g) Werner Heisenberg –
~3~
Phenomena: Atoms are the basic unit of matter; Atoms combine in a variety of ways to make up all types of
matter.
Complete the timeline.
400 BC
1800
1810
1820
1830
1840
1840
1850
1860
1870
1880
1890
1890
1900
1910
1920
1930
1940
1940
2017
~4~
Phenomena: Atoms are the basic unit of matter; Atoms combine in a variety of ways to make up all types of
matter.
Atoms and Molecules Web Quest Worksheet – Key
1. Define Atom
Building block of nature
2. There are _______________________________________ of atoms in your body.
Billions of billions
3. Your body is made up of about ______________ different elements.
40
4. Chemistry works almost ______________ elements.
120
5. How many different molecules can be made with the elements?
Millions
6. Identify the three parts of an atom and identify the charge of each particle. Also, identify where
they are found.
Particle
Proton
Neutron
Electron
Charge
Positive
Neutral
Negative
Where Found
Nucleus
Nucleus
Orbiting around uncles
7. Where are electrons found?
Electron cloud
8. The mass of these particles are almost the same.
Proton & Neutron
9. To be electrically neutral, an atom must have and equal number of…
Electrons & protons
~5~
Phenomena: Atoms are the basic unit of matter; Atoms combine in a variety of ways to make up all types of
matter.
10. Atom comes from the Greek word meaning _____________________________.
Undivided
11. This is the most abundant element in the universe.
Hydrogen
12. There are about _______________________ known molecules that can be made with carbon.
10 million
13. How big is an atom?
One tenth of a billionth of a meter.
14. Draw and label a diagram showing the structure of a atom.
Should show protons/neutrons/electrons
15 What makes a atom stick together?
Electromagnetic force
16. Define molecule.
Any time two atoms join together, they make a molecule.
17. The chemical symbol for sugar is C6H12O6. How many of each molecules would you have?
Element
Carbon
Hydrogen
Oxygen
Number of Atoms
6
12
6
18. What percentage of the mass of the human body is made up of oxygen atoms?
66
~6~
Phenomena: Atoms are the basic unit of matter; Atoms combine in a variety of ways to make up all types of
matter.
19. Molecules are made up of more than one…
a. atom.
b. electron.
c. element.
d. neutron.
e. proton.
a. atom
20. What is the common name for the compound H2O?
a. Ammonia
d. Sugar
b. Carbon dioxide e. Water
c. Glucose
e. Water
21. This shows the atoms in a molecule.
Chemical formula
22. Identify problems with atom models.
The sizes of the particles in an atom are very different!
23. An electron is at least __________________ times smaller than a proton.
10,000
24. The entire atom is __________________ times larger than the nucleus.
10,000
25. An atom is mostly __________________________________________.
Empty space
~7~
Phenomena: Atoms are the basic unit of matter; Atoms combine in a variety of ways to make up all types of
matter.
26. Explain what the following people did to expand our knowledge about atoms. Include their
contribution and in which year they made their discoveries.
a. Democritus – First proposed idea of atom
b. John Dalton – All elements made of atoms; atoms are indivisible; all atoms of an element
are the same.
c. Sir J. Joseph Thomson – Identified positive and negative forces in atoms.
d. Ernest Rutherford – Atoms are mostly empty space.
e. Neils Bohr – Atoms like miniature solar system; electrons orbit nucleus.
f. James Chadwick – Discovered the neutron.
g. Werner Heisenberg – Exact location of electron cannot be found.
400 BC
1800
1810
1820
1830
1840
Democritus
400 BC
1840
John Dalton
1803
1850
1860
1870
1880
1890
1890
1900
1910
1920
1930
1940
J. Joseph Thompson Ernest Rutherford Neils Bohr
1897
1908
1913
1940
2017
James Chadwick
1926 Werner Heisenberg
1932
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