কাজ
অ্যাসিড বদহজম, অম্বল, অন্ত্র প্রস্তুতি থেরাপি, পুষ্টি সম্পূরক চিকিৎসায় নির্দেশিত হয়।
0 Answers
Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
Calcium (Ca) and strontium (Sr) are expected to show chemical reactions similar to magnesium (Mg). This is because the number of valence electrons (2) is same in all these three...
1 Answers 1 views
What are isoelectronic ions? Account for the decrease in size of following species oxide ion > Fluoride ion > sodium ion > magnesium ion.
The ions having same number of electrons are called isoelectronic ions. The above order is due to increasing order of effective nuclear charge.
1 Answers 2 views
How would you explain the fact that the first ionization enthalpy of sodium is lower than that of magnesium
The first ionization enthalpy of sodium is more than that of magnesium. This is primarily because of two reasons: a. The atomic size of sodium is greater than that of magnesium b....
1 Answers 1 views
Beryllium and Magnesium do not give colour to flame whereas other alkaline earth metals do so why?
Due to high ionisation enthalpy of Be and Mg.
1 Answers 1 views
Beryllium and magnesium do not give colour to flame whereas other alkaline earth metals do so. Why?
On heating an alkali earth metal or its salt, the electrons are excited easily to higher energy levels because of absorption of energy. When these electrons return to their ground...
1 Answers 1 views
What happens when (i) magnesium is burnt in air
Magnesium burns in air with a dazzing light to form MgO Quick lime combines with silica to form slag(CaSiO3) When chlorine is added to slaked lime we get bleaching powder. Calcium nitrate on...
1 Answers 1 views
Write down the formula of (i) sodium oxide (ii) aluminium chloride (iii) sodium suphide (iv) magnesium hydroxide
(i) Sodium oxide → Na2O (ii) Aluminium chloride → AlCl3 (iii) Sodium suphide → Na2S (iv) Magnesium hydroxide → Mg(OH)2
1 Answers 1 views
Write the chemical formula of the following: (a) Magnesium chloride (b) Calcium oxide (c) Copper nitrate (d) Aluminium chloride (e) Calcium carbonate
(a) Magnesium chloride →MgCl2 (b) Calcium oxide →CaO (c) Copper nitrate →Cu(NO3)2 (d) Aluminium chloride →AlCl3 (e) Calcium carbonate →CaCO3
1 Answers 2 views
Calculate the number of moles of magnesium present in a magnesium ribbon weighing 12 g. Molar atomic mass of magnesium is 24g mol–1.
Number of moles 12 / 24 = 0.5 mol
1 Answers 1 views
Compute the difference in masses of 10^3 moles each of magnesium atoms and magnesium ions. (Mass of an electron = 9.1×10–31 kg)
A Mg2+ ion and Mg atom differ by two electrons. 103 moles of Mg2+ and Mg atoms would differ by 103 × 2 moles of electrons Mass of 2 ×103 moles of electrons...
1 Answers 1 views