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WorksheetsChemistry Checkpoint
Total questions: 25
Worksheet time: 17mins
Second shell can hold up to
2 electrons
8 electrons
18 electrons
32 electrons
Which chemical equation shows a displacement reaction?
Carbon + oxygen → carbon dioxide
Copper sulfate + magnesium → magnesium sulfate + copper
Magnesium + oxygen → magnesium oxide
Sodium hydroxide + hydrochloric acid → sodium chloride + water
Which chemical equation shows the formation of a metal oxide?
Carbon + oxygen → carbon dioxide
Copper sulfate + magnesium → magnesium sulfate + copper
Magnesium + oxygen → magnesium oxide
Sodium hydroxide + hydrochloric acid → sodium chloride + water
Given the following metals, which is the most reactive among these metal elements?
Zinc copper Sodium Iron
zinc
copper
Sodium
iron
Which of the following reaction is an example of endothermic reaction?
Neutralization
Rusting
Decomposition of calcium carbonate
Decomposition of hydrogen peroxide
_____ reactions usually feel hot!
endothermic
exothermic
What instrument would you use to detect an endothermic or exothermic reaction?
triple beam balance
ruler
thermometer
In an endothermic reaction, energy is _________.
absorbed
released
Phosphorus is very reactive
Metal
Non metal
Metalloid
None of the above
Metals react with acids to produce a gas
Carbon dioxide
Nitrogen
Hydrogen
Oxygen
Metals are good conductor of
Only heat
Only electricity
Heat and electricity both
None of the above
Metals react with water to produce
Metal hydroxide
Hydrogen gas
Metal hydroxide and hydrogen gas both
None of the above
Name the metal which is in liquid state.
Iron
Mercury
Zinc
Aluminium
Isotopes are atoms of the same element with different numbers of
electrons
neutrons
protons
nuclei
The elements that touch the zigzag line on the Periodic Table are called
metals
nonmetals
metalloids
gasses
The history of the Atomic Theory involves many changes from its early form. Theories change because
people decide to no longer agree with them.
all theories must be changed after a certain time.
new evidence is found that allows the theory to be changed.
when scientists die, their theories are always changed.
What comes after Silicon in the periodic table?
S
P
Si
Al
Atomic Number of Oxygen is __________
8
7
18
17
Diamond and Graphite are two main forms of (a) element.
