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Chemical Reactions And Periodic Table
Test Description: Periodic Table and Chemical Reactions
Instructions: Answer all questions to get your test result.
1) What is a chemical equation?
A
a starting substance in a chemical reaction
B
an equation that is not balanced
C
The area of a chemical reaction in which a new substance formed
D
a symbolic representation of a chemical reaction
2) What is a reactant?
A
a balanced equation
B
a symbolic representation of a chemical reaction
C
The area of a chemical reaction in which a new substance formed
D
a starting substance in a chemical reaction
3) What term describes a change in which a new substance is produced?
A
a chemical equation
B
an equation
C
a physical change
D
a chemical change
4) Which term best describes the idea that mass is not changed during a chemical reaction?
A
Theory of conservation of mass
B
unbalanced equations
C
Theory of conservation of matter
D
Theory of conservation of Energy
5) An element's atomic number is equal to that element's __________.
A
number of electrons
B
symbol
C
atomic mass
D
number of protons
6) Throughout the periodic table, as the atomic number increases, the atomic mass ______________.
A
increases
B
is equal to the atomic number
C
stays the same
D
decreases
7) In a chemical formula, if the element F, Florine, has a subscript of 3 next to it, how many atoms of fluorine are present?
A
3
B
0
C
1
D
6
8) In every balanced chemical equation, each side of the equation has the same number of ____.
A
molecules
B
atoms of each element on each side of the yield sign
C
coefficients
D
subscripts
9) In the molecule, 2HCl, how many Chlorine atoms are present?
A
3
B
1
C
2
D
4
10) In the formula, CO, How many oxygen atoms are present?
A
3
B
1
C
4
D
2
11) What is a balanced equation?
A
a symbolic representation of a chemical reaction
B
The area of a chemical reaction in which a new substance formed
C
an equation in which each side has the same number of atoms of each element
D
a chemical equation that does not show the same amounts of reactants and products
12) What is a product?
A
The area of a chemical reaction in which substances are combined together
B
a symbolic representation of a chemical reaction
C
The area of a chemical reaction in which a new substance formed
D
an equation in which each side has the same number of atoms of each element
13) What is an unbalanced equation?
A
an equation in which each side has the same number of atoms of each element
B
The area of a reaction in which substances are combined together
C
an equation in which each side has an uneven number of atoms of each element
D
The area of a chemical reaction in which a new substance formed
14) What is an atom?
A
the largest element in every molecule
B
the basic building block of matter
C
a marshmallow
D
a molecule
15) The element Neon has an atomic number of 10. This means that an atom of neon ....
A
Is a positive atom.
B
Will always have 10 neutrons.
C
Sometimes contains 10 protons.
D
Will always have 10 protons.
16) Carbon has an atomic mass of 12.011 and an atomic number of 6. Which of the following statements is true?
A
Carbon has six electrons.
B
Carbon has 12 protons.
C
None of these are true.
D
Carbon has 7 neutrons.
17) The element Lithium has an atomic number of 3 and an atomic mass of 6.941. On average, how many neutrons does an atom of Lithium contain?
A
6.941
B
4
C
3
D
7
18) Which of the following statements is true?
A
The protons and neutrons are found in the nucleus, but do not affect the total mass of the atom.
B
The protons are found in the nucleus, but do not affect the total mass of the atom.
C
The electrons are found outside the nucleus, and do not affect the total mass of the atom.
D
The electrons are found in the nucleus.
19) An atom contains 53 protons, 57 neutrons, and 53 electrons. How would you best describe this atom?
A
None of these options.
B
This atom has a positive overall charge.
C
This atom has a neutral overall charge.
D
This atom has a negative overall charge.
20) How many electrons can fit in the first electron ring?
A
3
B
0
C
2
D
8
*select an answer for all questions
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