1) Which element is this? a) Gold b) Iron c) Copper d) Mercury e) Hydrogen f) Zinc 2) Which element is this? a) Helium b) Neon c) Argon d) Krypton e) Xenon f) Radon 3) Which element is this? a) Potassium b) Mercury c) Uranium d) Germanium e) Boron f) Lithium 4) Which element is this? a) Lithium b) Sodium c) Potassium d) Rubidium e) Caesium f) Francium 5) Which element is this? a) Fluorine b) Chlorine c) Bromine d) Iodine e) Astatine 6) Which element is this? a) Hydrogen b) Helium c) Argon d) Strontium e) Neon f) Nitrogen 7) Which element is this? a) Calcium b) Boron c) Iron d) Phosphorus e) Strontium f) Cobalt 8) Which element is this? a) Carbon b) Aluminium c) Boron d) Fluorine e) Silicon f) Sodium 9) Which element is this? a) Sodium b) Lithium c) Fluorine d) Sulfur e) Uranium f) Calcium 10) Which element is this? a) Hydrogen b) Nitrogen c) Oxygen d) Argon e) Fluorine f) Chlorine

لوحة الصدارة

النمط البصري

الخيارات

تبديل القالب

استعادة الحفظ التلقائي: ؟