Skip to content

Course home

Sign up

5.1.2a Composition of the nucleus and isotopes

EasyMedium
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147
Question 84
a.

Use words from the box to complete the sentences about the charges in an atom. Words can be used once, more than once or not at all.

negative, neutral, positive \text{negative, neutral, positive} negative, neutral, positive
  • The charge on the nucleus of an atom is _____________________
  • The charge on a neutron is _____________________
  • The charge on electrons orbiting the nucleus is _____________________
[3]
b.

A nucleus of cesium-137 has the nuclide notation:

55137Cs {}^{137}_{55}\text{Cs} 55137​Cs

Determine the number of protons in a nucleus of cesium-137.

[1]
c.

Determine the number of neutrons in a nucleus of cesium-137.

[1]
d.

Cesium has another isotope, cesium-135. Write the nuclide notation for cesium-135.

[1]
e.

Cesium-137 has a half-life of 30 years.

A sample contains 48 mg48\text{ mg}48 mg of cesium-137.

Calculate the time for the sample to decay until only 6.0 mg6.0\text{ mg}6.0 mg of cesium-137 remains.

[2]
Markscheme

5.1.2a Composition of the nucleus and isotopes Questions

  1. IGCSE
  2. /Physics
  3. /5.1.2a Composition of the nucleus and isotopes

170 exam-style questions on CIE IGCSE Physics 5.1.2a Composition of the nucleus and isotopes. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank