Based on periodic trends, which atom of a group 2 element is the smallest? a) Mg

Question

Based on periodic trends, which atom of a group 2 element is the smallest? a) Mg b) Be c) Ba d) Ca e) Sr Based on periodic trends, which atom of a period 4 element is the smallest? a) Br b) greaterthanorequalto c) Ga d) Ca e) K Based on periodic trends, which atom has the lowest ionization energy? a) Br b) greaterthanorequalto c) Ga d) Ca e) K Based on periodic trends, which atom has the lowest ionization energy? a) F b) O c) N d) C e) B Based on periodic trends, which atom has the greatest electron affinity? a) F b) O c) N d) C e) B Based on periodic trends, which atom has the largest electronegativity? a) F b) O c) N d) C e) B What is the major factor that determines how polar a covalent bond is? a) the number of lone pairs of electrons on each atom b) the total number of electrons in each atom c) the difference between the electronegativities of each atom d) the number of electron pairs shared between each atom e) the number of valence electrons in each atom Which acid would you expect to have the most polar bond based on periodic trends? a) HI b) HBr c) HCl d) HF e) all have similar bond polarities

Explanation / Answer

Answer:

45) Answer (b) .... Be

Explanation:

In the group 2 elements it is the first element. It is having the lower atomic radii.

Generally in the groups from Top to bottom the atomic radius Increases.

46) Answer: (a) ..... Br

Explanation:

In the period of the periodic table from left to right the atomic radius decreases.

Reason: From left to right of period the elecrons can be filled in the same shell of the orbital, Then the nuclear atraction on the outer most shell of electrons increases as a result of this the atomic radius decreases.

47) Answer: (e) ....... K

Explanation:

K is the First group of element. It is having the only one valency electron. By the loss of one electron it gets the stable Inner gas configuration. Hence its Ionization energy is less.

48) Answer: (e) ........ B

Explanation:

From left to right of the periodic table the Ionization energy increases in the same period. Here B is the group 3 element. Hence its Ionization energy is less among the other atoms.

49) Answer: (a) ....... F

Explanation:

From left to right of the periodic table the electron affinity increases in the same period. Here all are same period elements hence the F is having the higher value.

50) Answer (a) ...... F

Explanation:

From left to right of the period the electronegativity increases due to the nuclear attraction on the outer most shell of the elctrons. Hence the F is the largest electronegativity atom in the periodic table.

51) Answer: (c)

Explanation:

If the electronegativity difference of the atoms is more in the molecule, It become more polar due to it can Ionize easily.

52) Answer: (d) ........ HF

Explanation:

The electronegativity difference between the two atoms is more.

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