5th-6th Science Chapter 7 Review, Part 1 Question Preview (ID: 40915)
Chapter 7 Review, Part 1, Atoms And Molecules.
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For sodium, Na is the _____.
a) atomic mass
b) atomic number
c) chemical symbol
d) element name
If the element copper has 29 protons, how many electrons does it have?
a) 0 electrons.
b) 14 electrons.
c) 29 electrons.
d) Not enough information.
What does the group of an element tell you?
a) How many protons are in the outer shell.
b) How many neutrons are in the outer shell.
c) How many atoms are in the outer shell.
d) How many electrons are in the outer shell.
What does the period of an element tell you?
a) How many shells the element has.
b) How many yolks the element has.
c) How many eggs the element has.
d) How many classes the element has.
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) Lemon juice, because it its acidity.
b) A baking soda paste, because it is a base.
c) Doing jumping jacks, because it will make your blood flow faster.
d) Crying, because it releases access water from the body.
Why are not all molecules also compounds?
a) Molecules are too small.
b) Compounds are produced by pounding, molecules are not.
c) Some molecules are produced of the same element (molecules), but some are produced of different elements.
d) Compounds are too small.
Scientist ____ developed a simplified model of an atom.
a) Dmitri Mendeleev
b) Ernest Rutherford
c) Neils Bohr
d) Robert Boyle
A ____ reaction occurs when a compound is broken down into simpler compounds.
a) combustion
b) decomposition
c) synthesis
d) replacement
A substance that changes color when exposed to acid or base solutions is called a(n)
a) indicator
b) ion
c) salt
d) molecule
The sum of the number of protons and neutrons results in an atom's approximate _____.
a) atomic number
b) electrons
c) atomic mass
d) pH scale
When positively and negatively charged ions attract each other they form a(n) _____.
a) covalent bond
b) neutron
c) indicator
d) ionic bond
The compound H2CO3 has ____ atom(s) of carbon in it.
a) zero
b) one
c) two
d) three
The scientist ___ developed the periodic table of elements.
a) Dmitri Mendeleev
b) Niels Bohr
c) Robert Boyle
d) Ernest Rutherford
You can determine the concentration of acids or bases in a solution by using ____.
a) a particle accelerator
b) the periodic table of elements
c) a salt
d) the pH scale
In a(n) ____ atoms share electrons.
a) ionic bond
b) covalent bond
c) salt
d) element
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