answer the following
Answers
Answer:
B the two metals which can be cut by knife are sodium and potassium
Explanation:
it will definitely help you A ..? c...?
Answer:
a) What happens when magnesium ribbon is heated in the presence of air?
→When magnesium ribbon is burnt in the air, it combines with oxygen to form white powder magnesium oxide MgO with the release of heat and light. It forms a white powder of magnesium oxide. Magnesium gives up two electrons to oxygen atoms to form this powdery product.
b) Name two metals which can be cut through knife.
→Sodium and potassium are two metals which are soft and can be cut with a knife.
c) What is composition of brass?
→Brass, alloy of copper and zinc, of historical and enduring importance because of its hardness and workability. The earliest brass, called calamine brass, dates to Neolithic times; it was probably made by reduction of mixtures of zinc ores and copper ores.