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WorksheetsPart II Microscopic World I
Total questions: 20
Worksheet time: 25mins
Which of the following statements concerning 3919X atom is correct?
A. It has 19 neutrons.
B. It has 20 protons.
C. X is found in Group I in the Periodic Table.
D. X is a non-metal.
Element Y consists of two naturally occurring isotopes, 10Y and 11Y, with relative abundances of 19.7% and 80.3% respectively. What is the relative atomic mass of Y?
A. 10.4
B. 10.6
C. 10.8
D. 11.0
The numbers of subatomic particles in species P and those in species Q are shown.
Which of the following statements concerning P and Q is correct?
A. P is the anion of Q.
B. Q is the anion of P.
C. P is the cation of Q.
D. Q is the cation of P.
The atomic number of element Z is 9. Which of the following elements has similar chemical properties as Z?
A. Sodium
B. Magnesium
C. Silicon
D. Chlorine
Which of the following substances has a giant covalent structure?
A. Sulphur dioxide
B. Silicon dioxide
C. Caesium chloride
D. Copper
Which of the following electron diagrams is correct?
(Only the outermost shell electrons are shown in the diagrams.)
The atomic numbers of elements X and Y are 7 and 17 respectively. Which of the following is the correct formula of the compound formed between X and Y?
A. XY
B. XY2
C. XY3
D. XY4
Which of the following statements concerning zinc is correct?
A. The relative atomic mass of zinc is 67.
B. There are 30 neutrons in each zinc isotope.
C. There are more electrons in6630Zn than 6430Zn.
D. There are 30 electrons in 7030Zn.
Which of the following is the correct explanation for the low melting point of fluorine?
A. There is only one bond pair of electrons in a fluorine molecule.
B. The atoms in each fluorine molecule are bonded together by weak covalent bond.
C. There are only two fluorine atoms in a fluorine molecule.
D. Fluorine molecules are held together by weak van der Waals’ forces.
Which of the following pairs of species have the same electronic arrangement?
A. Cl–, F–
B. Ne, Na+
C. Li, Be2+
D. N3–, Ar
Element Z has three outermost shell electrons. Which of the following is the correct formula of the oxide of Z?
A. ZO
B. ZO2
C. Z2O3
D. Z3O2
Which of the following statements concerning helium is correct?
A. Helium atom has an octet structure.
B. Helium is flammable.
C. Helium exists as diatomic molecules.
D. There are two protons in a helium atom.
The diagram is the electron diagram of a compound formed between element X and chlorine (only the outermost shell electrons are shown).
What is the formula of the compound formed between element X and aluminium?
A. AlX
B. AlX2
C. Al2X3
D. Al3X2
Which of the following compounds has the highest melting point?
A. HCl
B. MgCl2
C. NCl3
D. CCl4
Element X has an atomic number between 13 and 20. It is a reactive gas at room conditions. What is element X?
A. Phosphorus
B. Chlorine
C. Argon
D. Fluorine
Which of the following species has the same number of electrons as O2–?
A. Ne
B. O2
C. C
D. Ca2+
Caesium is an element below sodium in the Periodic Table. Which of the following statements concerning caesium is correct?
A. It reacts explosively with neon.
B. It is a soft metal.
C. It reacts with oxygen to form a covalent compound.
D. It reacts with water to form an acidic solution.
Which of the following statements about carbon disulphide, CS2, is/are correct?
(1) Double bonds form between the carbon and sulphur atoms.
(2) The sulphur atom is negatively charged in the carbon disulphide molecule.
(3) The numbers of lone pairs of electrons and that of bond pairs of electrons are equal.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
Which of the following subatomic particles must be present in a hydrogen ion?
(1) Proton
(2) Neutron
(3) Electron
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
Which of the following properties of diamond are due to the strong covalent bonds in it?
(1) Diamond is extremely hard.
(2) The melting point of diamond is very high.
(3) Diamond does not conduct electricity.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
