This document discusses the classification of matter into elements, compounds, and mixtures. An element consists of only one type of atom and cannot be separated into simpler substances. A compound contains two or more elements chemically bonded together and has distinct properties from its constituent elements. A mixture is not chemically combined and can be separated into its components by physical means alone. Elements, compounds, and mixtures differ in their composition and the ways they can be separated.
Organic Chemistry: Classification of Organic Compoundsulcerd
Lecture materials for the Introductory Chemistry course for Forensic Scientists, University of Lincoln, UK. See http://forensicchemistry.lincoln.ac.uk/ for more details.
A/B Testing You Might Be Driving in the Wrong Direction TOMASZ BORYS
@Kissmetrics #KissWebinar @thuelmadsen
Thue is the Kissmetrics Webinar Wizard and Marketing Ops Manager. Before joining forces with Kissmetrics, he was a Lyft driver in SF, which is also how he ended up as a Kissmetrics marketer. Whenever Thue is not trying to automate everything around him, you can find him hiking in the Sierras. THUE MADSEN Marketing Operations Manager, Kissmetrics @ThueLMadsen Tomasz loves dipping his feet in the river while fishing, injuring his thumb while gaming, hacking away at a golf club, and driving demand at Kissmetrics. He’s also the biggest fan of gummy bears. TOMASZ BORYS Director of Marketing, Kissmetrics @tbcali
@Kissmetrics #KissWebinar @tbcali
1 The optimum strategies for A/B testing 2 How we A/B Test at KISSmetrics 3 A/B Testing beyond click conversions - having a pulse on the entire funnel and why it’s important TABLE OF CONTENTS 4 The influence social traffic has in the funnel
• Set a Goal • Baby Steps • Aim for Statistical Significance • Never Lose Sight THE OPTIMUM STRATEGIES FOR A/B TESTING
Baby Steps People want to move the needle and see results fast, by implementing multiple changes at once. But how can you be sure what element had an impact?
Aim for Statistical Significance SET A GOAL Aim for Statistical Significance getdatadriven.com
Never Lose Sight We can caught up on what we think is best to optimize conversions or traffic…but data doesn’t lie
• 4,000 and above sample size • 99% Statistical Confidence • Blind Eye for 1 Week HOW WE A/B TEST AT KISSMETRICS
4,000 and Above Sample Size Significant or decent amount of data is needed when you’re testing beyond click conversions
4,000 and Above Sample Size significant or decent amount of data is needed when you’re testing beyond click conversions 99% Statistical Confidence Police
Blind Eye for 1 Week Data can be very erratic the first several days, so it’s easy to hit the panic button
A/B Testing Beyond Click Conversions
ORIGINAL
VARIANT
SIGNUPS
Signups Install JS
Custom Data
Custom Data Opportunities Created
SOCIAL AD FUNNEL
TOMASZ BORYS Director of Marketing, Kissmetrics @tbcali tborys@kissmetrics.com THUE MADSEN Marketing Operations Manager, Kissmetrics @ThueLMadsen tmadsen@kissmetrics.com Questions?
Sink or Swim? Supporting the Transition to New Manager | Webinar 08.11.15BizLibrary
60% of frontline managers fail within the first two years in their role. 26% felt they were not ready for the role, and 58% reported receiving no management training. What can you do to turn these numbers around?
www.bizlibrary.com
Virtual teams are becoming a norm for modern businesses. According to PGi's 2015 Global Telework Survey, 79% of knowledge workers reported working outside the office.
With more teams working remote, it's important to remember a few commandments to keep teams working successfully.
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
3. Elements
Definition of an element:
An element is a pure substance which
cannot be split up into two or more
simpler substances by chemical
means.
Sugar is not an element as it can be
broken down into carbon and water.
4. Elements
Note that an element:
• Consists of only one kind of atom,
• Cannot be broken down into a simpler
type of matter by either physical or
chemical means
• Can exist as either atoms (e.g. argon) or
molecules (e.g., nitrogen).
5. Chemical Symbols of Elements
Chemists use symbols to represent elements.
For example, O represents oxygen while Fe
represents iron.
Element Symbol Element Symbol
Calcium Ca Mercury Hg
Carbon C Neon Ne
Hydrogen H Silicon Si
Iron Fe Sodium Na
6. Compounds
Note that a compound:
• can be broken down into a simpler type of
matter (elements) by chemical means (but
not by physical means),
• has properties that are different from its
component elements, and
• always contains the same ratio of its
component atoms.
7. What is a compound?
A compound is a substance which is made up of two or
more elements chemically combined together.
- Chemical reactions taking place.
Qn: Is this a compound?
It only contains one type
of element.
Qn: Is this a compound?
It only contains one type
of element.
Qn: Is this a compound?
O
H
H
O
O
It is not chemically
combined.
8. Making compounds from their
elements Example: Making water (picture)
ELEMENTS
hydrogen COMPOUND
(colourless
gas)
oxygen
(colourless
gas)
lighted
splint
heat, light
and
explosion
water
(colourless liquid)
Water
Oxygen molecule
molecule
Hydrogen
molecule
mixture of
hydrogen
and
oxygen
water
Example: Making water (models)
heat,
light and
explosio
n
9. Summarizing
• A compound is made up of two or more
elements chemically joined together
• A compound has a fixed composition
• Every compound has a unique chemical
formula
• A compound has a completely different
properties from its elements
• A chemical reaction (decomposition or
electrolysis) is needed to separate the
elements in the compound
10. Mixtures
Definition of a mixture:
A mixture is not a pure substance as it
contains a mixture of atoms of
molecules which are not chemically
combined together.
11. Mixtures
• Note that a mixture:
• consists of two or more different elements
and/or compounds NOT chemically combined.
• Can be homogeneous or non-homogeneous
• can be separated into its components by
physical means, and
• often retains many of the properties of its
components.
12. Mixtures
• Examples of mixtures include muddy
water and air.
Air is made up of gases such as nitrogen
and oxygen mixed together.
13. Conclusion
An element is a pure substance which cannot be
split up into two or more simpler substances
by chemical means.
A compound consist of a fixed number of
different kinds of atoms chemically combined
together.
A mixture is not a pure substance as it contains
a mixture of atoms of molecules which are not
chemically combined together.
