Electronegativity is the property of the element to attract electrons to its nucleus. The trend of electronegativity in the periodic table is decreasing from right to left and decreasing from top to bottom. hence from the given elements, the element with the highest electronegativity should be A.beryllium
Given reaction:
A + B ------ C + D
mass of A = 19 grams
Mass of B = 26 grams
Mass of C = 17 grams
To determine: The mass of D
Explanation:
As per the law of conservation of mass, in any chemical reaction the sum of masses of the reactants and products must remain unchanged.
Sum of masses of reactants = Sum of masses of products
19 g + 26 g = 17 g + D
Mass of D = (19+26) - 17 = 28 g
