Exam (elaborations)
CEM 141 CLICKER QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
- Course
- Institution
CEM 141 CLICKER QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
[Show more]
Content preview
CEM 141 CLICKER QUESTIONS ANDANSWERS WITH SOLUTIONS 2024
Is "What temperature will my coffee be if I add milk to it?" a scientific question? - ANSWER Yes (testable
and repeatable)
Is "Do Angels have wings?" a scientific question? - ANSWER No (not testable and not repeatable)
Is "Can my dog understand what I say?" a scientific question? - ANSWER Not enough information
"An atom of hydrogen has one Proton" is an example of... - ANSWER Fact
"The force of attraction between masses is proportional to the product of the masses, and inversely
proportional to the square of the distance between them" is an example of... - ANSWER Law
"If we add reagent X to a reaction it will go faster" is an example of... - ANSWER Hypothesis
"Special relativity (time and space are not absolute but are relative to each other)" is an example of... -
ANSWER Theory
"What will happen if we add X to the reaction?" - ANSWER Question
Which of the following has atoms in it?
-Heat
-Cells
-Air
-Gold - ANSWER Cells Air and Gold
Which is biggest?
-An Atom
, -A molecule
-A cell
-It depends - ANSWER It depends
How big is an atom (H)? - ANSWER 0.1 nanometer (0.1 x 10^-9)
What properties ascribed by the Greeks to atoms do we still consider to be valid? - ANSWER Atoms are
in constant motion
If atoms are in constant motion, what do you think keeps them moving? - ANSWER Energy
What distinguishes one element from another? How do the atoms of different elements differ? -
ANSWER Number of Protons
What types of evidence might be used to conclude that you had isolated a new element? - ANSWER
Unique number of protons, have different structures, different atomic masses, DIFFERENT PROPERTIES
What types of elements would be difficult to identify? - ANSWER Noble gases (Don't react with most
things and are gases)
What is the difference between an atoms and a molecule - ANSWER Molecule is a collection of atoms
What is the difference between an element and a compound? - ANSWER Element is made up of one kind
of atom and a compound is made of many elements
Does "Elements are composed of small indivisible indestructible particles called atoms" from Dalton's
Theory still hold today? - ANSWER No (protons, neutrons, elections are smaller, and atoms are divisible)
Does "All atoms of an element are identical and have the same mass and properties" from Dalton's
Theory still hold today? - ANSWER No (Isotopes have same number of protons but a different number of
neutrons)
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 Performance. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79650 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now