Topic 2

Question 1

isotopes

Answer 1

Atoms of the same element with different no of neutrons. They have the same chemical properties but different physical properties

Question 2

Wavelength

Answer 2

The distance between on crest theorugh another

unit= m

Question 3

Frequency

Answer 3

The number of wave that pass a fixed poiunt in 1 sec

Question 4

Gamma rays —-VIBGYOR———–Radio waves

Answer 4

High energy —-Low enerhy
Short w.l———–
High freq———

Question 5

Quantum theory

Answer 5

An electron in an atom can only have fixed energy values
The energy of an electron is quantized

Question 6

Heisenberg uncerntantity principle

Answer 6

We cannot know both the location and spin of an electron at the same time

Question 7

Exception to the thingy

Answer 7

Cu
4s eclectron is transferred to the 3d to make 3d more stable
4s1 3d10

Cr
4s1 3D5

Question 8

Continous vs emission line spectrum

Answer 8

Continous- all wavelengths of light is obtained

Emission-emit a line spectrum which contains emissions at particular wavelengths

Question 9

Explanation of emission spectra

Answer 9

when energy is supplied to a gaseous atom its e- are excited and are promoted from a lower to a higher enerhy level absorbing energy

The excited state becomes unstable and electron drops down to e lvel emitting quantised energy in the form of phtons

Emits certain wavelengths