Complete the table: Neutral atom Atomic number Nucleon number Number of each sub-atomic particle present Mg 12 24 Al 13 27

Neutral atom Atomic number Nucleon number Number of each sub-atomic particle present Mg 12 24 proton- 12, electron-12, neutron-12 Al 13 27 proton- 13, electron- 13, neutron- 14 Atomic number presents the number of protons and nucleon number represents the total number of sub-atomic particles present inside the nucleus of an atom.

The table below shows the two naturally occurring isotopes of chlorine. Complete the table: Cl 17 35 Cl 17 37 number of protons number of electrons number of neutrons

Cl 17 35 Cl 17 37 number of protons 17 17 number of electrons 17 17 number of neutrons 18 20 Isotopes are atoms of same element having the same number of protons but different number of neutrons. Isotopes of a particular element have the same chemical properties because they have the same number of electrons.

MEDIUM

AS and A Level

IMPORTANT

Earn 100

Zirconium, $Zr$ , and hafnium, $Hf$ , are metals.

The subatomic particles present in zirconium and hafnium are electrons, neutrons and protons. A beam of protons is fired into an electric field produced by two charged plates, as shown in the diagram.

i) Describe how the beam of protons behaves when it passes through the gap between the charged plates.
ii) Explain your answer.

Important Questions on Atomic Structure

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 1 - Atomic Structure>EXAM-STYLE QUESTIONS>Q 2

The subatomic particles present in zirconium and hafnium are electrons, neutrons and protons. Describe and explain what happens when a beam of neutrons passes through the gap between the charged plates instead of protons in the figure:

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