Chemical Reactions And Periodic Table Question Preview (ID: 33727)
Periodic Table And Chemical Reactions.
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What is a chemical equation?
a) a symbolic representation of a chemical reaction
b) an equation that is not balanced
c) a starting substance in a chemical reaction
d) The area of a chemical reaction in which a new substance formed
What is a reactant?
a) a balanced equation
b) The area of a chemical reaction in which a new substance formed
c) a symbolic representation of a chemical reaction
d) a starting substance in a chemical reaction
What term describes a change in which a new substance is produced?
a) a physical change
b) a chemical change
c) a chemical equation
d) an equation
Which term best describes the idea that mass is not changed during a chemical reaction?
a) Theory of conservation of Energy
b) Theory of conservation of matter
c) Theory of conservation of mass
d) unbalanced equations
An element's atomic number is equal to that element's __________.
a) number of electrons
b) atomic mass
c) symbol
d) number of protons
Throughout the periodic table, as the atomic number increases, the atomic mass ______________.
a) decreases
b) increases
c) stays the same
d) is equal to the atomic number
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) 1
b) 0
c) 3
d) 6
In every balanced chemical equation, each side of the equation has the same number of ____.
a) atoms of each element on each side of the yield sign
b) molecules
c) coefficients
d) subscripts
In the molecule, 2HCl, how many Chlorine atoms are present?
a) 1
b) 2
c) 3
d) 4
In the formula, CO, How many oxygen atoms are present?
a) 1
b) 2
c) 3
d) 4
What is a balanced equation?
a) a chemical equation that does not show the same amounts of reactants and products
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 symbolic representation of a chemical reaction
What is a product?
a) a symbolic representation of a chemical reaction
b) an equation in which each side has the same number of atoms of each element
c) The area of a chemical reaction in which a new substance formed
d) The area of a chemical reaction in which substances are combined together
What is an unbalanced equation?
a) The area of a chemical reaction in which a new substance formed
b) an equation in which each side has the same number of atoms of each element
c) an equation in which each side has an uneven number of atoms of each element
d) The area of a reaction in which substances are combined together
What is an atom?
a) a molecule
b) the basic building block of matter
c) a marshmallow
d) the largest element in every molecule
The element Neon has an atomic number of 10. This means that an atom of neon ....
a) Will always have 10 neutrons.
b) Will always have 10 protons.
c) Is a positive atom.
d) Sometimes contains 10 protons.
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) Carbon has 7 neutrons.
d) None of these are true.
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) 4
c) 7
d) 6.941
Which of the following statements is true?
a) The protons are found in the nucleus, but 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 outside the nucleus, and do not affect the total mass of the atom.
d) The electrons are found in the nucleus.
An atom contains 53 protons, 57 neutrons, and 53 electrons. How would you best describe this atom?
a) This atom has a positive overall charge.
b) This atom has a negative overall charge.
c) This atom has a neutral overall charge.
d) None of these options.
How many electrons can fit in the first electron ring?
a) 2
b) 3
c) 8
d) 0
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