Answer: The alkali metals consist of the chemical elements lithium (Li), sodium (Na), potassium (K),[note 1] rubidium (Rb), caesium (Cs),[note 2] and francium (Fr).
Explanation:
Answer:
Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.
Explanation:
Sodium Carbonate(NaCO3) gives off heat hence the reactions involving Na2CO3 are exothermic.
Hope this helps!
Let's see the reaction for each situation.
2 NaCl + C₂O₄²⁻ → Na₂C₂O₄ + Cl₂
CaCl₂+ C₂O₄²⁻ → CaC₂O₄ + Cl₂
Thus, it would differ whether the main product is sodium oxalate or calcium oxalate. In their solid forms, both are white. However, calcium oxalate is insoluble in water, while sodium oxalate is slightly soluble. So, if you used NaCl instead of CaCl₂, you wouldn't observe any precipitate in your solution. If there is, it would only be minute.
