Group 7
1. This question has 4 part(s).
1.1. Group 7 elements are known as the halogens.
Chlorine is a Group 7 element with an atomic number of 17.
Complete Figure 1 show the number of neutrons, protons and electrons in the two isotopes of chlorine.
chlorine-35 | chlorine-37 | |
number of neutrons | ||
number of protons | ||
number of electrons |
Figure 1
1.2. A regular sample of chlorine contains only chlorine-37 and chlorine-35 atoms.
Explain why the relative atomic mass of chlorine is 35.5.
1.3. Chlorine can react with non-metals to form covalent compounds
It reacts with carbon to form tetrachloromethane, CCl4.
Draw a dot and cross diagram to show the bonding in one molecule of this compound.
Show outer shell electrons only.
1.4. Higher Only
Chlorine also reacts with potassium bromide in a displacement reaction.
Cl2 + 2Kl ⟶ 2KCl + l2
i) Explain which species which has been reduced.
(1)
ii) Write the half equation for the oxidation reaction that occurs here.
(2)
Ai এর মাধ্যমে
১০ লক্ষ+ প্রশ্ন ডাটাবেজ
প্র্যাকটিস এর মাধ্যমে নিজেকে তৈরি করে ফেলো
উত্তর দিবে তোমার বই থেকে ও তোমার মত করে।
সারা দেশের শিক্ষার্থীদের মধ্যে নিজের অবস্থান যাচাই
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