chapter 3 - electronic configurations

Question 1

what is frequency

Answer 1

the number of waves that pass a point per second

Question 2

what is wavelength

Answer 2

the distance between 2 consecutive peaks on the wave

Question 3

pneumonic to remember em spectrum from the longest wavelength and lowest frequency

Answer 3

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Question 4

what are particles of electromagnetic radiation called

Answer 4

photons

Question 5

line spectrum

Answer 5

only certain frequencies/ wavelengths of light present

Question 6

continuous spectrum

Answer 6

all frequencies/ wavelengths of light present.

Question 7

what does Bohr model explain

Answer 7

provides an explanation of the lines in the hydrogen atom emission spectrum.
In this model, atoms consist of a central nucleus with electrons moving around it

Question 8

exceptions to aufbau principle

Answer 8

Chromium- [Ar] 3d5 4s1
copper-[Ar] 3d10 4s1

Question 9

what is the aufbau principle

Answer 9

filling the subshells of energy with the lowest energy first (1s)

Question 10

Each subshell can hold a specific number of orbitals

Answer 10

s subshell : 1 orbital
p subshell : 3 orbitals labelled px, py and pz
d subshell : 5 orbitals
f subshell : 7 orbitals

Question 11

The ionisation energy across a period generally…

Answer 11

increases

Question 12

why does the ionisation energy across a period generally increase

Answer 12

Across a period the nuclear charge increases
This causes the atomic radius of the atoms to decrease,It becomes harder to remove an electron as you move across a period; more energy is needed
So, the ionisation energy increases