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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
The area of a chemical reaction in which a new substance formed
C
a symbolic representation of a chemical reaction
D
an equation that is not balanced
2) What is a reactant?
A
a symbolic representation of a chemical reaction
B
a starting substance in a chemical reaction
C
The area of a chemical reaction in which a new substance formed
D
a balanced equation
3) What term describes a change in which a new substance is produced?
A
a physical change
B
a chemical equation
C
an equation
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
Theory of conservation of Energy
C
unbalanced equations
D
Theory of conservation of matter
5) An element's atomic number is equal to that element's __________.
A
number of protons
B
symbol
C
atomic mass
D
number of electrons
6) Throughout the periodic table, as the atomic number increases, the atomic mass ______________.
A
increases
B
stays the same
C
is equal to the atomic number
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
1
C
6
D
0
8) In every balanced chemical equation, each side of the equation has the same number of ____.
A
coefficients
B
molecules
C
atoms of each element on each side of the yield sign
D
subscripts
9) In the molecule, 2HCl, how many Chlorine atoms are present?
A
3
B
4
C
2
D
1
10) In the formula, CO, How many oxygen atoms are present?
A
4
B
3
C
2
D
1
11) What is a balanced equation?
A
The area of a chemical reaction in which a new substance formed
B
a symbolic representation of a chemical reaction
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
a symbolic representation of a chemical reaction
B
The area of a chemical reaction in which substances are combined together
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 an uneven number of atoms of each element
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
The area of a reaction in which substances are combined together
14) What is an atom?
A
the basic building block of matter
B
a molecule
C
the largest element in every molecule
D
a marshmallow
15) The element Neon has an atomic number of 10. This means that an atom of neon ....
A
Will always have 10 protons.
B
Will always have 10 neutrons.
C
Is a positive atom.
D
Sometimes contains 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
None of these are true.
B
Carbon has 12 protons.
C
Carbon has 7 neutrons.
D
Carbon has six electrons.
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
3
B
6.941
C
4
D
7
18) Which of the following statements is true?
A
The electrons are found outside the nucleus, and do not affect the total mass of the atom.
B
The protons and neutrons are found in the nucleus, but do not affect the total mass of the atom.
C
The electrons are found in the nucleus.
D
The protons are found in the nucleus, but do not affect the total mass of the atom.
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 negative overall charge.
D
This atom has a neutral overall charge.
20) How many electrons can fit in the first electron ring?
A
3
B
2
C
8
D
0
*select an answer for all questions
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