Chemistry Part 2 Summative Test study guide B – ANSWER KEY
Define the following terms:
1.
2.
3.
4.
5.
6.
Atom - the smallest particle of an element
Electron – The negatively charged subatomic particle of an atom
Nucleus - The center region of the atom where protons and neutrons are located
Proton - The positively charged subatomic particle of an atom
Neutron - The electrically neutral particle of an atom
Atomic Number - The unique number that identifies the element and also the amount of protons
and electrons found in the atom.
7. Atomic Mass – the average mass of the protons and neutrons in an atom.
8. Element symbol – The letter that represents the element on the periodic table of elements
Look at the Fluorine on your periodic table and identify the number of
9.
10.
11.
12.
13.
14.
15.
16.
17.
Protons 9 – (Equals the atomic number)
Electrons 9 – (Equals the atomic number)
Neutrons 10 – (Equals the atomic mass minus the atomic number)
Draw a model of fluorine atom making sure to label the charge of each subatomic particle. Also
be sure to label the nucleus.
What are the physical properties of metals? Malleable, Ductile, High Density, Conductive
What are the chemical properties of metals? Corrosive, Reactive
What are the physical properties of non –metals? Low density, poor conductors, dull, brittle
What are the chemical properties of non – metals? Some are reactive, some are not
What elements are the most reactive and where are they located on the periodic table? The
most reactive elements are the alkali metals located in the first family of the periodic table of
elements. The column all the way to the left of the periodic table.
18. What elements are the least reactive and where are they located on the periodic table? The
least reactive elements are the noble gases which are located in the last family of the periodic
table of elements. The column all the way to the right of the periodic table of elements.
19. Where are the noble gases located on the periodic table? The column all the way to the right of
the periodic table of elements
20. Where are the metals located on the periodic table? The metals are located all the way to the
left and over to the metalloids portion of the periodic table.
Chemistry Part 2 Summative Test study guide B – ANSWER KEY
21. Where are the non-metals located on the periodic table?
22. Where are the metalloids located on the periodic table?
Define the following terms:
23. Element - the pure substance that cannot be broken down into any other substances by
chemical or physical means
24. Compound - is a pure substance made of two or more elements that are chemically combined in
a set ratio.
25. Chemical formula – show the elements in a compound and the ratio of atoms.
Chemistry Part 2 Summative Test study guide B – ANSWER KEY
26. Chemical equation – is a short, easy way to show a chemical reaction, using symbols instead of
words.
27. Chemical reaction – A change in matter that produces one or more new substances
28. Reactants - The substances you have in the beginning of your reaction.
29. Products - The substances you have at the end of your reaction
30. Law of conservation of matter – The principle of the law of conservation of mass / matter that in
a chemical reaction, the total mass of the reactants must equal the total mass of the products
Draw a model of the following molecule:
H2O + Na(HCO3)  CO2 + NaOH + H2O
31. Identify the products in the chemical reaction above: NaOH (Sodium Hydroxide) + H2O (Water)
32. Identify the reactants in the chemical reaction above. H2O (Water)+Na(HCO3) (Sodium
Bicarbonate)
33. Prove that the above equation proves the law of conservation of matter.
34. Describe the factors that can affect the rate of a chemical reaction.
Surface area, Temperature, concentration, catalysts and inhibitors