- 1. What are the three subatomic particles of an atom?
A) shell, symbol,and proton
B) protons, nucleus, and electron cloud
C) proton, valences, and bohrs
D) protons, neutrons, and electrons
- 2. Which of these elements is stable due its electronic configuration?
A) Mg
B) Al
C) Cl
D) Ne
- 3. (a) How many shells does the element Magnesium have in the electron cloud?
(b) In what period does it (magnesium) belong?
A) 2, 2
B) 3, 3
C) 2, 3
D) 3, 2
- 4. How many electrons can be placed in the first shell (k)?
A) 2
B) 6
C) 8
D) 4
- 5. How many protons does Boron contain?
A) 6
B) 4
C) 5
D) 7
- 6. What subatomic particle brings about Isotopy (difference in mass) in atoms?
A) electron
B) nucleus
C) neutron
D) proton
- 7. Given that the atomic mass of sodium as 23, how many neutrons does the element Sodium contain?
A) 11
B) 10
C) 12
D) 23
- 8. Which of these is correct?
A) Solute= Solution - Solvent
B) Solute= Solvent - Solution
C) Solution= Solute - Solvent
D) Solvent= Solute - Solution
- 9. Where in the atom are protons and neutrons found?
A) not sure
B) nucleus
C) electron cloud
D) shells
- 10. Which of these elements has 8 valence electrons, 18 protons and 22 neutrons?
A) Argon
B) Bromine
C) Oxygen
D) Fluorine
- 11. Which of these elements has achieved a stable electronic configuration?
A) Na+
B) Mg
C) Na
D) Cl
- 12. Calculate the number of moles of solute dissolved in 40cm³ of aqueous nitric acid, whose of concentration is 0.2mol.dm–³
A) 0.04 mol
B) 0.004 mol
C) 0.008 mol
D) 0.08 mol
- 13. Calculate the mass of anhydrous copper(II)sulphate in 55cm³ of a 0.20mol.dm–³ solution of copper(II)sulphate. Leaving your answer in 4sf.
(Ar values: Cu = 63.5g, O = 16.0g, S = 32.0g)
A) 1.800g
B) 1.7545g
C) 1.755g
D) 1.754g
- 14. In a reaction between Zinc and aqueous copper(II) sulphate, the correct ionic equation is:
A) Zn²+(s) + Cu(s) → Zn(s) + (Cu²+).
B) (Zn²+) + Cu(s) → (Zn²+) + Cu(s).
C) Zn(s) + (Cu²+) → (Zn²+) + Cu(s).
D) (Zn²+) + Cu(s) → Zn(s) + Cu²+(s).
- 15. In an ionic equation of a reaction between Zinc and aqueous copper(II) sulphate, the spectator ion is:
A) Zn²+
B) Cu²+
C) Zn
D) SO₄²-
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