Define the term compound.

Important Questions on Atoms and Elements

EASY

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 3 - Atoms and Elements>Checkup on Chapter 3>Q □

Where in the atom the nucleus is present and which particles it contains?

MEDIUM

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 3 - Atoms and Elements>Checkup on Chapter 3>Q □

Define proton number and nucleon number.

EASY

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 3 - Atoms and Elements>Checkup on Chapter 3>Q □

State the number of protons, neutrons and in an atom, from a short description like this: ${}_{11}{}^{23}\mathrm{Na}$.

EASY

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 3 - Atoms and Elements>Checkup on Chapter 3>Q □

Explain what is a radioisotope?

EASY

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 3 - Atoms and Elements>Checkup on Chapter 3>Q □

Give one medical and one industrial use for radioisotopes.

MEDIUM

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 3 - Atoms and Elements>Checkup on Chapter 3>Q □

Sketch the structure of an atom showing the nucleus and electron shells.

MEDIUM

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 3 - Atoms and Elements>Checkup on Chapter 3>Q □

Name the first $20$ elements of the periodic table, in order of proton number, and give their symbols.

MEDIUM

Upper Secondary: IGCSE

IMPORTANT

Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 3 - Atoms and Elements>Checkup on Chapter 3>Q □

Sketch the electron distribution for any of one the first $20$ elements of the periodic table, when you are given the proton number.