Chemistry
Calcium, cobalt, nitrogen, magnesium, and silicon are some elements. Using this information complete the following.
(a) …………… is the most reactive metal.
(b) …………… is a metalloid.
(c) …………… is a non-metal.
Periodic Table
8 Likes
Answer
(a) Calcium is the most reactive metal.
(b) Silicon is a metalloid.
(c) Nitrogen is a non-metal.
Answered By
4 Likes
Related Questions
Identify the salts X and Y from the following observations.
(a) Salt X is white in colour. On strong heating, it produces buff yellow residue and liberates reddish brown gas. Solution of salt X produces chalky white insoluble precipitate with excess of ammonium hydroxide.
(b) Salt Y is black in colour. On reacting with conc. HCl, it liberates a pungent greenish yellowish gas which turns moist starch iodide paper blue black.
Write the products and balance the equation.
(a) Na2CO3 + H2SO4 ⟶
(b) Fe + H2SO4 ⟶
Give reasons:
(a) Covalent compounds have low melting point.
(b) For covalent bond formation both atoms should have high ionisation.
(c) Covalent bond formation takes place when both atoms should have four or more electron in outermost shell.
Glucose or blood sugar has the molecular formula C6H12O6. Determine % of each element.