chpt 4 atomic structure

Question 1

What are isotopes ?

Answer 1

1. isotopes are atoms of the same element with the same number of protons but diff number of neutrons
2. diff physical properties BUT same chemical properties

Question 2

What are atoms made of and how does it constituents contribute to its mass ?

Answer 2

proton charge +1
electron charge -1
neutron charge 0
same number of protons and electrons
total atomic number-proton number=number of neutrons
proton and neutrons contribute to mass of atom, electrons are so light that their mass is negligible

Question 3

What are the behaviours of sub-atomic particles in an electric field ?

Answer 3

1. electrons deflect far away (lighter than protons so they are deflected to a larger extent) to the positive charged plate
2. protons are deflected less far to the negatively charged plate
3. neutrons remain unaffected and continue in a straight line
4. angle of deflection is denoted as ‘a’

Question 4

What are the behaviours of sub-atomic particles in an electric field ?

Answer 4

1. electrons deflect far away (lighter than protons so they are deflected to a larger extent) to the positive charged plate
2. protons are deflected less far to the negatively charged plate
3. neutrons remain unaffected and continue in a straight line
4. angle of deflection is denoted as ‘a’