Development of the periodic 7/5/17 table Quick Fire 5! (SA – Click to reveal.) 1. What is an atom that has lost or gained an electron? 2. What is an atom of an element that has a different number of neutrons? 3. Which particle has a positive charge? 4. What do the atoms in period 2 have in common? 5. What do the atoms in group 3 have in common?
1. Ion 2. Isotope 3. Proton 4. They have 2 electron shells 5. They all have 3 electrons in their outer shell
Development of the Periodic Table 7/5/17
Homework To be completed by th Wednesday 12 July 2017
7/5/17
Development of the periodic table Ms Speers
Development of the Periodic Table 7/5/17
Development of the Periodic Table 7/5/17
• Name scientists & describe how the periodic table has developed over time • Evaluate the contributions of Newlands & Mendeleev in the development of the periodic table.
Development of the Periodic Table 7/5/17
• Using iPads, access the lesson PowerPoint and complete the activity associated with your objective. • Once finished, complete the plenary at the end.
Development of the Periodic Table
Put your selfie here
7/5/17
Development of the Periodic Table 7/5/17
Amber Task Name scientists & describe how the periodic table has developed over time
Development of the Periodic Table 7/5/17
For each slide.... • Click on the picture to follow the link. • Name the scientist & briefly describe their contribution to the development of the periodic table. • Edit the PowerPoint with the correct answers. • Once completed, save with a selfie on the first page so I know who it belongs to.
Development of the Periodic Table 7/5/17
Scientist:
• invented _____________ for ______________ • He concluded that.... • all matter is made of ___________ • all the atoms of an __________ are identical to each other • ____________ are formed when two or more different kinds of atoms join together
Development of the Periodic Table 7/5/17
Scientist: • Discovered the law of _____________ in 1817. • Each triad was a group of _________________ • The ________________ and reactions of the elements in a triad were ______________ to each other.
Development of the Periodic Table 7/5/17
Scientist: • Discovered the law of _____________ in 1864. • He arranged all the elements known at the time into a _________ in order of ________________________ • He found that each element was similar to the element __________ places further on. • But it had problems. For example, he put ________ in the same group as ________ and __________, which are two nonmetals. As a result, his table was not accepted by other scientists
Development of the Periodic Table 7/5/17
Scientist:
• Arranged the elements known at the time in order of _________________, but he did some other things that made his table much more successful. • He realised that the ____________ and __________ properties of elements were related to their atomic mass in a 'periodic' way, and arranged them so that ___________ of elements with ____________ properties fell into vertical columns in his table.
• This method of arranging elements meant there were _________. But instead of seeing this as a problem, he thought it simply meant that the elements which belonged in the gaps had _________________________.
Development of the Periodic Table 7/5/17
How is the periodic table arranged today?
Development of the Periodic Table 7/5/17
Stretch & Challenge Try this... • Spot the elements! Compare the modern periodic table & Mendeleev’s to find the 2 pairs of elements that are in a different order on each table.
Development of the Periodic Table 7/5/17
Green Task Evaluate the contributions of Newlands & Mendeleev in the development of the periodic table. Click on the pictures in the Amber task to learn about the History of the Periodic Table
Development of the Periodic Table 7/5/17
• Newlands & Mendeleev On the next slide... • Summarise the pros & cons of each periodic table. • Make a conclusion: Who made the most important contribution? Explain your answer.
Development of the Periodic Table 7/5/17
Newland’s Periodic Table • Pros
• Cons
Development of the Periodic Table 7/5/17
Mendeleev’s Periodic Table • Pros
• Cons
Development of the Periodic Table 7/5/17
Who made the most important contribution?
Development of the Periodic Table 7/5/17
Plenary
Development of the Periodic Table 7/5/17
Test your knowledge of Newlands & Mendeleev • Take the test!
• Write your score here ___________