Other
Intro to chemistry SAQ exemplar answers
- Course
- Institution
This document contains the intro to chemistry SAQ exemplar answers.
[Show more]
Seller
Follow
SportsBTECGuy
Reviews received
Content preview
DistanceLearningCentre.comANSWERS TO SAQS
Subject: Chemistry / Medicine
Unit: Introduction to Chemistry/ Fundamentals of Chemistry
Topic 1: Introduction to Chemistry/ Fundamentals of Chemistry
Level: 3
SAQ 1:
1. In the table below, complete the four columns by filling the atomic
and mass numbers and symbol for the elements and the numbers
of protons, electrons and neutrons.
Element Number of Number of Number of
protons electrons neutrons
27
13 Al
11 5
B
35
29 Cu
40 20
Ca
20
19 K
56
26
Answer:
Element Number of Number of Number of
protons electrons neutrons
27 13 13 14
13 Al
11 5 5 6
5B
64 29 29 35
29 Cu
40 20 20 20
20 Ca
39 19 19 20
19 K
56 26 26 30
26 Fe
© DistanceLearningCentre.com, 2022 1
, Subject: Chemistry / Medicine
Unit: Introduction to Chemistry/ Fundamentals of Chemistry
Topic: Introduction to Chemistry/ Fundamentals of Chemistry
Level: 3
ANSWERS TO SAQs
SAQ 2:
1. Give the electronic structure of the following elements. The atomic
number of the elements is given in brackets.
a) Lithium (3)
b) Carbon (6)
c) Argon (18)
d) Potassium (19)
2. Give the electronic structure for the following species which are
ions. These are charged particles formed by the removal
or addition of electrons to and from neutral atoms. In the case of
the magnesium ion (Mg2+) it will have had two electrons removed
from the atom. The reverse is true for the bromide ion (Br-) which
will have one electron added to the atom.
a) Lithium ion Li+
b) Oxide ion (oxygen (8)) O2-
c) Sulphide ion (sulphur (16)) S2-
d) Calcium ion (20) Ca2+
Answers:
1.
a) 1s2 2s1
b) 1s2 2s2 2p2
c) 1s2 2s2 2p6 3s2 3p6
d) 1s2 2s2 2p6 3s2 3p6 4s1 – note 4s fills before 3d
2.
a) 1s2
b) 1s2 2s2 2p6
c) 1s2 2s2 2p6 3s2 3p6
d) 1s2 2s2 2p6 3s2 3p6
© DistanceLearningCentre.com, 2022 2
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller SportsBTECGuy. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.89. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75632 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now