Chemistry 5070/21 — May/June 2019

Cambridge O-Level · Theory · worked solutions for every part, with the mark scheme

questions

marks

minutes

Topics Atoms, Elements and Compounds · Stoichiometry · The Periodic Table · Chemical Reactions · Acids, Bases and Salts · Metals · +6 more

Q15MAtoms, Elements and CompoundsThe Periodic TableFree sample

Choose from the particles shown to answer the questions.

$^{79}_{35}\text{Br}$ $^{39}_{20}\text{Ca}$

$^{35}_{17}\text{Cl}$ $^{37}_{17}\text{Cl}^{-}$

$^{37}_{17}\text{Cl}$ $^{64}_{29}\text{Cu}$

$^{23}_{11}\text{Na}$ $^{20}_{10}\text{Ne}$

$^{17}_{8}\text{O}$ $^{18}_{8}\text{O}^{2-}$

Each particle can be used once, more than once or not at all.

(a)

Which particle has only 20 protons in its nucleus?

______

(b)

Which particle has a nucleon number of 35?

______

(c)

Which particle has an electronic structure of 2.8.8?

______

(d)

Which particle is an atom with only 10 neutrons in its nucleus?

______

(e)

Which particle is an atom of a transition element?

______

The rest of this paper

9 more questions

Q2The Periodic Table · Atoms, Elements and Compounds · Electrochemistry · Chemical Reactions · Metals · Acids, Bases and Salts12M
Q3The Periodic Table · Metals · Atoms, Elements and Compounds · Stoichiometry7M
Q4Chemistry of the Environment8M
Q5Stoichiometry7M
Q6Acids, Bases and Salts · Chemical Energetics6M
Q7Chemical Reactions · Stoichiometry · Experimental Techniques and Chemical Analysis · Acids, Bases and Salts · Atoms, Elements and Compounds10M
Q8Chemical Reactions · Atoms, Elements and Compounds · Stoichiometry10M
Q9Organic Chemistry · Stoichiometry · States of Matter · Atoms, Elements and Compounds10M
Q10Organic Chemistry · Stoichiometry10M

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