Question 14 2.5 points Question 15 The central atom in ________ violates the oct

Question

Question 14

2.5 points   

Question 15

The central atom in ________ violates the octet rule.

PF5

SF2

Cl2

Br2CO

FCN

2.5 points   

Question 16

Gamma radiation only changes the atomic number but not the mass number of a nucleus.

True

False

2.5 points   

Question 17

The oxidation number of phosphorus in PF5 is ________.

+5

+3

+1

-5

0

2.5 points   

Question 18

Positron emission causes a decrease of one in the atomic number.

True

False

2.5 points   

Question 19

The hybrid orbital set used by the central atom in PCl5 is ________.

sp

sp2

sp3

sp3d

sp3d2

2.5 points   

Question 20

The element that corresponds to the electron configuration 1s22s22p2 is ________.

lithium

beryllium

boron

nitrogen

carbon

Pb

Explanation / Answer

14) Ans: -1e0

15) SF2

16) False

17) +5 (The P valency is 5)

18) True

Positron emission or beta plus decay (+ decay) is a particular type of radioactive decay and a subtype of beta decay, in which a proton inside a radionuclide nucleus is converted into a neutron while releasing apositron and an electron neutrino (e).

19) SP3d

20) Carbon

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