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WorksheetsFORMATIVE QUESTION: CHAPTER 2
Total questions: 13
Worksheet time: 7mins
The isotopes of an element have:
Same number of neutrons
Same atomic number
Same mass number
Same number of electron
The relative atomic masses of many
elements are not whole numbers
because:
They cannot be determined accurately
The atoms ionize during determination of their masses
Existence of isotopes
Presence of impurities
An ion X3+ has 10 electrons and 14 neutrons. What is the nucleon number of its element X?
16
37
27
18
Give the IUPAC Name for FeSO4
Iron (IV) sulphate
Iron (III) sulphate
Iron sulphate
Iron (II) sulphate
The chemical formula for mecury (I) sulfide is
Hg2S
HgS
Hg2S2
HgS2
Determine the number of neutron in Bromine-79 if number of electron is 35.
35
44
79
45
Which of the following compounds does not contain a cation with +2 charge?
ZnS
Ti2O3
Ba3(PO4)2
Cu(CN)2
Considering the methods for making salt, the reaction of acid and base gives
salt and water
salt and hydrogen
salt, carbon dioxide and water
salt and salt
Which compound is formed when zinc reacts with sodium hydroxide?
Zinc hydroxide
Zinc nitrate
Sodium zincate
Zinc carbonate
Determine the number of electron in 7Li+ if number of neutron is 4.
3
4
7
2
Determine relative atomic mass of element Z if atomic mass is 11.7u
11.7
11.7u
12u
12
An atom of element X is 19.6 times is heavier than one carbon-12 atom. What is the relative atomic mass of element X?
235.2
235.2u
19.6u
19.6
Calculate the relative molecular mass of ammonium nitrate, NH4NO3 .
(RAM of N=14, H=1, O=16)
81
79
80
82
