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WorksheetsCHAPTER 1 MATTER
Total questions: 15
Worksheet time: 17mins
1 Which of the following number of subatomic particles of carbon atom is correct?
6 protons and 6 neutrons
12 protons and 6 neutrons
6 protons and 12 neutrons
12 protons and 12 neutrons
Which of the following information are obtained directly from a mass spectrum?
I Number of isotopes present
II Molar mass of the isotopes
III Molecular formula of a compound
IV Percentage abundances of isotopes
I and II
II and III
III and IV
I and V
In an experiment, a compound was found to contain 15% of hydrogen and 85% of carbon by mass. What is the empirical formula of this compound?
CH2
CH4
C2H4
C4H10
What is the mass of 3.35 moles of sulfur trioxide
335 g
268 g
245 g
125 g
A subatomic particle that has a negative charge is called a(n)
proton
neutron
electron
nucleus
An iron atom has an atomic mass of 56. Its atomic number is 26. How many neutrons does the iron atom have?
30
26
56
82
Which one is atom?
Na(s)
NaCl(s)
H2O(l)
Br2(l)
An atom made up above particles, EXCEPT:
Proton
Neutron
Electron
Nucleon
Determine the number of neutron for element Cu
63
29
34
92
______________is total number of protons and neutrons in the nucleus of an atom of an element
Nucleon
Isotopes
Nucleus
Atom
Determine formula compound for salt, ammonium nitrate
NH3N
NH4NO3
NH4NO2
NH3NO2
Determine the number of electron.
9
5
4
2
Relative atomic mass (Ar) =
mass of one atom
1/12 x mass of one atom of Y
Atom of Y is _______________
carbon-12
carbon-13
carbon-14
carbon-15
What is isotopes?
same proton number but different electron number
same nucleon number but different proton number
same proton number but different nucleon number
same neutron number but different nucleon number
