chemistry Quiz

Question Number 1 What is the symbol of Wight? A. Wg B. m C. W D. s Question Number 2 What is the symbole of Hydrogen ion? A. H B. Hy C. H+ D. Hr Question Number 3 The ion Cu2+ is a : A. monoatomic ion B. polyatomic cation C. neutral atom Question Number 4 symbol of copper atom A. Ca B. Cu C. Cd D. C Question Number 5 An atom containing 12 protons and 12 electrons,it's atomic number is: A. 24 B. 0 C. 21 D. 12 Question Number 6 Helium is a gas which molecule is: A. Monoatomic B. diatomic C. triatomic D. polyatomic Question Number 7 A molecule containing one atom of nitrogen and 2 atoms of oxygen has a formula A. NO B. NO2 C. N2O D. N2O2 Question Number 8 Three molecules of butane is represented by: A. 3 C2H6 B. (C4H10)3 C. 3 CH4 D. 3C4H10 Question Number 9 Sulfur A. S B. Su C. Sul D. K Question Number 10 Argon A. A B. Ag C. Ar D. An Question Number 11 Chlorine A. C B. Cl C. Ch D. Chl Question Number 12 Silicon A. S B. Si C. Sl D. Sil Question Number 13 Calcium A. Ca B. C C. Cal D. Cm Question Number 14 What is the physical state of water molecule? A. gas B. solid C. liquid Question Number 15 What is the physical state of Dichlorine molecule? A. gas B. solid C. liquid Question Number 16 What is the physical state of ammonia molecule? A. gas B. solid C. liquid Question Number 17 What is the physical state of methane molecule? A. liquid B. gas C. solid Question Number 18 What is the physical state of Dibromine molecule? A. liquid B. solid C. gas Question Number 19 An atom contains as many electrons as neutrons A. True B. False Question Number 20 A neutron has no mass A. True B. False Question Number 21 The nucleons are situated in the nucleus A. True B. Fasle