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WorksheetsPHSC Quiz -Week 12 - Ch 6, 7, 8, & 10
Total questions: 36
Worksheet time: 19mins
Who developed the first periodic table?
Dimitri Mendeleev
Albert Einstein
Marie Curie
Nikola Tesla
Elements in the same column of the periodic table have the same number of ______________.
neutrons
atoms
valence electrons
protons
Which group contains the most reactive metals?
alkali metals
transition metals
post-transition metals
noble gas metals
Noble Gases are the least reactive elements.
True
False
What two elements make up water?
Oxygen and helium
Oxygen and hydrogen
Water is only made of one element
Carbon and oxygen
Any element with an atomic number above 92 is man-made and only has radioactive isotopes.
True
False
Water is non-polar.
True
False
Molecules that are non-polar are symmetrical.
True
False
Electrons in the outer energy level of an atom are called valence electrons.
True
False
What is a covalent bond?
When electrons are shared but shared unequally.
Two atoms share one or more pairs of outer-shell electrons.
When electrons are shared in a sea of electrons among atoms.
When two atoms bond when one or more electrons are given to one atom by another atom.
An alloy is a mixture of a metal with one or more other elements.
True
False
A combustion reaction always has O2 and CO2 as its products.
True
False
Which is the correct general equation for a double replacement reaction?
A + B → AB
A + BC → B + AC
AB + CD → AD + CB
AB → A + B
Which is the correct general equation for a synthesis reaction?
A + B → AB
A + BC → B + AC
AB + CD → AD + CB
AB → A + B
Which is the correct general equation for a decomposition reaction?
A + B → AB
A + BC → B + AC
AB + CD → AD + CB
AB → A + B
Which is the correct general equation for a single replacement reaction?
A + B → AB
A + BC → B + AC
AB + CD → AD + CB
AB → A + B
An endothermic reaction takes less energy to break bonds in the reactants than is released when new bonds form in the product.
True
False
The law of conservation of mass states that mass can neither be created nor destroyed.
True
False
Combustion reactions absorb energy.
True
False
How many Iron atoms are there in this formula? (Iron's chemical symbol is Fe) 2Fe2O3
4
2
3
10
Balance the formula Cu + S8 --> CuS
The formula is already balanced.
8Cu + S8 --> 8CuS
2Cu + S8 --> 4CuS
9Cu + 2S8 --> 18CuS
How many atoms are in one molecule of glucose? The chemical formula for glucose is C6H12O6.
12
24
6
18
Concentration is the number of particles of a substance in a given volume.
True
False
How does a catalyst affect the reaction rate?
It speeds it up.
It slows it down.
It does not affect the rate.
A catalyst is used up in a chemical reaction.
True
False
Which of the following is not a sign of a chemical reaction?
Production of bubbles
Color change
Production of a solid
Production of a liquid
Activation energy is the energy required to keep a chemical reaction going.
True
False
The reaction rate can be sped up by:
Decreasing the temperature
Increasing the surface area of the reactants
Decreasing the concentration of the reactants
Removing a catalyst
A solution is formed when a solute dissolves in a solvent.
True
False
The dissolving rate can be sped up by:
Decreasing the temperature
Increasing the temperature
Keeping the substances as still as possible
Decreasing the surface area of the solute
Water can dissolve any solute.
True
False
Some substances are insoluble in water.
True
False
Compounds called indicators change color when acids come into contact with them.
True
False
Vinegar is a very strong acid.
True
False
Drain cleaner is a strong base that can burn skin.
True
False
The strength of acids and bases is measure by the ______.
pH scale
concentration scale
neutral ion scale
aB scale
