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Newland’s periodic table

Periodic Table Project

By Saad 8A

What is group 1 called?

The elements of Group 1 are called the Alkali metals they are:lithium, sodium, potassium, rubidium, cesium, and francium.

Properties of group 1 metals

These are highly reactive metals with a strong tendency to participate in ionic bonding by forming cations with a charge of +1.

In the alkali group, as we go down the group we have elements Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs) and Francium (Fr). They have all only one electron in their outermost shells. All the elements show metallic properties and have valence +1. They give up electron easily.

How many electrons do elements in group 1 have in their outer shell?

How is the periodic table arranged now?

One

Differences between group 1 metals and transition metals.

Alkali metals are more reactive. Transition metals are shiny but quikly tarnish.Alkali metals are stored in oil.

Trends seen in group 1

Four major factors: nuclear charge, atomic radius, shielding effect and sublevel arrangement (of electrons.)

It is arranged by increasing atomic number. Atomic number is the number of protons in an atoms nucleus. The number of protons in an atoms nucleus is what makes an element that specific element. Like Hydrogen has one proton in each nucleus, then add one more proton and it turns into Helium, add another and it turns into Lithium, and etc.

Metal reactivity relates to ability to lose electrons (oxidize), form basic hydroxides, form ionic compounds with non-metals

Trends in group 7

For the Halogens the atomic radii increase as u go down the group..they still maintain the same 7 outer electron shell configuration tho..ie although the charge on the nucleus increases, the net effect on the outermost electrons (7 of them) is 7 in magnitude=const. ie the net effect of the electron shielding remains the same in terms of charge diff.This explains the increase in atomic radii as u go from Fluorine>Iodine. For electronegativity the attraction to the Halogen atom say from a H-atom is less as you go down the table..this is because the distance of the 'extra' electron from the Halogen nucleus increases and the attraction varies inversely as the sq of the distance.

Properties of group 7

The trends in some atomic and physical

properties of the Group 7 elements

fluorine,chlorine, bromine and iodine.

Separate sections cover the trends in

atomic radius, electronegativity, electron

affinity, melting and boiling points and

solubility on the bond enthalpies (strengths)

of halogen-halogen bonds (for example, Cl-Cl)

and of hydrogen-halogen bonds (e.g. H-Cl)

Where are the transition metals on the periodic table?

The transition metals of the periodic table are found in the center of the periodic table at periods 4, 5, and 6 and groups 3-12.

Properties of transition metals

exelent conductors of heat and electricity sturdy and noncorrosive very strong mostly nonreactive. They are transferrred to be in the non- metalloids.

Properties of transition metals

What is group 7 called?

Group 7 elements are called halogens.

strong mostly nonreactive

Mandaleevs Periodic Table

How did Mendeleev solve some of the problems found in Newland’s table?

Basically Newlands was so near breaking the code himself but he worked on the assumption that elements worked in group of eight [Newlands Octave] with the pattern of similar elements re-occurring every eight elements. Unfortunately it only worked for the first couple of 'octaves'. Although he was ridiculed when he presented his theory to the Royal Society in London, he wasn't far off cracking the code Mendeleev simply realised that the repeating pattern wasn't always ever 8 elements and spent more time lining up similar elements under each other when the repeating pattern became more obvious.

So Mendeleev gets all the credit, but dear old Newlands still deserves a mention in chemical history.

How did they decide what went where?

Russian chemist Dmitri Mendeleev created the original periodic table (which was organized by atomic mass) in 1869.

Why is the periodic table called a periodic table?

What was wrong with the early periodic tables?

The periodic table is organized in rows called periods. Periodic means Repeating Pattern. Since the chemical and physical properties of elements have a repeating pattern, the table that lists the elements is called a periodic table.

The first periodic table was developed by a Russian chemist and inventor named Dmitri Mendeleev, who arranged the elements by atomic mass. However, British chemist Henry Moseley later decided to order the elements by atomic number, thus creating a new arrangement. Moseley's table is the one used today.

The reason why the periodic table is called so is because the rows are arranged in periods which helps to tell their properties

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