IB chemistry - The atom and periodic table

Question 1

Which of the following electron transitions of the hydrogen atom will release the most energy?

Accepted Answer

n = 6 to n= 1

Question 2

Which of the following does NOT have three unpaired electrons?

Accepted Answer

Ni3+

Question 3

Rhenium (z=75) has two naturally occurring isotopes,185Re and 187Re. What are the abundances?

Accepted Answer

185Re = 40%, 187Re = 60%

Question 4

Which of the following electron configurations is NOT correct?

Accepted Answer

Cu:1s22s23s23p64s23d9

Question 5

Which is an alkali metal in period 4?

Accepted Answer

K

Question 6

Which transition would absorb the radiation of the shortest wavelength?

Accepted Answer

B

Question 7

Compared to the parent atom, metal ions are always ___ than the parent atom.

Accepted Answer

Smaller

Question 8

In which of these does the second element have a lower 1st ionization energy than the first?

Accepted Answer

Ne Ar

Question 9

How many neutrons are in an atom of carbon-14?

Accepted Answer

8

Question 10

The table shows the first four ionization energies for an element. Which group is it in?

Accepted Answer

Group 1

Question 11

Rank these sub levels within the same main energy level from low to high energy

Accepted Answer

s p d f

Question 12

Planks constant is 6.6x10-34 Js.The energy of a light photon with a frequency of 5.0 x 1014 is

Accepted Answer

3.32 x 10-19 J

Question 13

Moving left to right across the periodic table, atomic radius...

Accepted Answer

Decreases

Questions 13