Which ion has the largest radius? a. I^- b. Br^- c. F^- d. Ar^- e. Cl^- Which io

Question

Which ion has the largest radius? a. I^- b. Br^- c. F^- d. Ar^- e. Cl^- Which ion has the largest radius? a. Mg^2+ b. Be^1+ c. Na^+ d. AP^+ e. Li^+ Arrange the following set of ions in order of decreasing ionic radio. AP^-, Ga^3+, Ca^2+, Rb^+, K^+ a. Rb^+ > K^+ > Ca^2+ > AP+ > Ga^1+ b. Ga^3+ > > AP^+ > Ca^2+ > Rb^+ > K^+ c. Rb^+ > K^+ > Ca^+ > Ga^3+ > AP^+ d. Rb^+ > Ga^3+ > Ca^2+ > K^+ > AP^+ e. Rb^+ > Ca^1+ > K^+ > Ga^3+ > AP^+ Which of these elements has the greatest attraction for elections in a covalent bond? a. Br b. greaterthanorequalto c. Se d. As e. Kr Which pair of elements below would be least likely to form an ionic bond between them? a. Cs/O b. C/N c. Na/S d. Al/F e. Mg/Br Write the balanced formula unit equation for the reaction of magnesium with hydrogen at high temperature. What is the sum of the coefficients? (Do not forget coefficients of one.) use the smallest whole comber coefficients. a. 3 b. 6 c. 5 d. 4 e. none of these

Explanation / Answer

14 which ion has largest radius

OPTION D ) At-

astatine ionic radius=200 pm

iodine ionic radius=198 pm

bromine ionic radius=190 pm

chlorine ionic radius175 pm

fluorine ionic radius150 pm

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15

OPTION C ) Na+

Na+ ionic radius=227 pm

beryllium ionic radius=190 pm

mg2+ ionic radius=220 pm

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16. OPTION C

Rb >K>Ca>Ga>Al

2.98 Å

Rubidium

2.77 Å

Potassium

2.23 Å

Calcium

1.81 Å

Gallium

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17 OPTION A   -BROMINE

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18 OPTION B

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2.98 Å

Rubidium

2.77 Å

Potassium

2.23 Å

Calcium

1.81 Å

Gallium

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