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5th-6th Science Chapter 7 Review, Part 1
Test Description: Chapter 7 Review, Part 1, Atoms and Molecules
Instructions: Answer all questions to get your test result.
1) For sodium, Na is the _____.
A
atomic number
B
atomic mass
C
element name
D
chemical symbol
2) If the element copper has 29 protons, how many electrons does it have?
A
Not enough information.
B
14 electrons.
C
29 electrons.
D
0 electrons.
3) What does the group of an element tell you?
A
How many protons are in the outer shell.
B
How many electrons are in the outer shell.
C
How many neutrons are in the outer shell.
D
How many atoms are in the outer shell.
4) What does the period of an element tell you?
A
How many yolks the element has.
B
How many classes the element has.
C
How many eggs the element has.
D
How many shells the element has.
5) If someone is bit by a fire ant, the bite is painful because of the acid it contains. Which of the following would help with this pain?
A
Crying, because it releases access water from the body.
B
A baking soda paste, because it is a base.
C
Lemon juice, because it its acidity.
D
Doing jumping jacks, because it will make your blood flow faster.
6) Why are not all molecules also compounds?
A
Compounds are produced by pounding, molecules are not.
B
Compounds are too small.
C
Molecules are too small.
D
Some molecules are produced of the same element (molecules), but some are produced of different elements.
7) Scientist ____ developed a simplified model of an atom.
A
Dmitri Mendeleev
B
Ernest Rutherford
C
Neils Bohr
D
Robert Boyle
8) A ____ reaction occurs when a compound is broken down into simpler compounds.
A
decomposition
B
replacement
C
synthesis
D
combustion
9) A substance that changes color when exposed to acid or base solutions is called a(n)
A
salt
B
indicator
C
molecule
D
ion
10) The sum of the number of protons and neutrons results in an atom's approximate _____.
A
electrons
B
atomic number
C
pH scale
D
atomic mass
11) When positively and negatively charged ions attract each other they form a(n) _____.
A
ionic bond
B
neutron
C
indicator
D
covalent bond
12) The compound H2CO3 has ____ atom(s) of carbon in it.
A
three
B
one
C
zero
D
two
13) The scientist ___ developed the periodic table of elements.
A
Niels Bohr
B
Ernest Rutherford
C
Dmitri Mendeleev
D
Robert Boyle
14) You can determine the concentration of acids or bases in a solution by using ____.
A
a particle accelerator
B
the pH scale
C
a salt
D
the periodic table of elements
15) In a(n) ____ atoms share electrons.
A
element
B
ionic bond
C
covalent bond
D
salt
*select an answer for all questions
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