Discover Top Posts Tagged with #c3.1

oh my GOD i love you travis

GCSE chemistry C3.1 AQA Flash cards and a mind map.

#gcse chemistry #gcse chemistry aqa #c3 #c3.1 #periodic table #alkali metals #halogen #transition metals #em is studying #studyblr #chemistry

liam just really loves the opportunity to put a twink in every campaign which like. alright respect stick to your forte

#i need a critrole tag #jesus christ c3 i NEED a tag #c3.1

Trends within the Periodic Table

Group 1

The elements in Group 1 of the Periodic Table are known as the alkali metals. They have some characteristics in common:

They are low-density metals (the first three elements in Group 1 are less dense than water)

They react with non-metals to form ionic compounds in which the metal ion has a charge of +1. The compounds are white solids that dissolve in water to form colourless solutions

They react with water to release hydrogen

They form hydroxides that dissolve in water to make alkaline solutions.

In Group 1, the further down the group an element is:

The more reactive it is

The lower its melting point and boiling point.

Transition Elements

Compared with the elements in Group 1, the transition elements:

Have higher melting points (except for mercury, which is a liquid at room temperature) and higher densities

Are stronger and harder

Are much less reactive, so do not react as vigorously with water or oxygen

Many transition elements also:

Have ions with different charges

Form coloured compounds

Are useful as catalysts

Group 7

The elements in Group 7 of the Periodic Table are known as the halogens. The have some characteristics in common:

They react with metals to form ionic compounds in which the halide ion carries a charge of --1.

In Group 7, the further down the group an element is:

The less reactive it is

The higher its melting point and boiling point

A more reactive halogen can displace a less reactive halogen from an aqueous solution of its salt.

The trends in reactivity within groups in the Periodic Table are due to the activity of electrons in the outer shells (highest energy levels). The higher the energy level of the outer electrons:

The more easy it is for electrons to be lost

The more difficult it is for electrons to be gained

#Chemistry #C3 #C3.1 #The Periodic Table #C3.1.3 #Trends within the Periodic Table

The Modern Periodic Table

The modern Periodic Table is arranged in order of atomic (proton) numbers. This was first done when protons, neutrons and electrons were first discovered early in the 20th century. This order solved the problems of elements being placed in the wrong places due to the order of atomic weights.

The modern Periodic Table arranges elements in terms of their electronic structures (which affect their properties).

Elements in the same group have the same number of electrons in their outer shell (highest energy level).

Elements in the same period have the same number of shells (energy levels).

#Chemistry #C3 #C3.1 #The Periodic Table #C3.1.2 #The Modern Periodic Table

The Early Periodic Table

The first people to make real attempts (with any success) to classify the elements are credited as Newlands and Mendeleev. They arranged the elements in order of their atomic weights, and the list could be arranged in such a way that the columns contained groups of elements with similar properties.

The name "Periodic Table" comes from the facts that there are regular intervals in the similar properties.

The early attempts at the Periodic Table were incomplete. This was because some elements were placed in groups that did not really make sense once more was found out about them, because the order of atomic weight was followed strictly. Mendeleev left gaps in his Periodic Table, because he noticed there were gaps in the pattern and deduced that some elements had not yet been discovered.

#Chemistry #C3 #C3.1 #The Periodic Table #C3.1.1 #The Early Periodic Table

The Periodic Table

The Periodic Table of the Elements is a device to show and categorise all of the known elements. It has been developed since the original designs made by Newlands and Mendeleev. The Periodic Table is laid out according to trends in the elements due to how easily they lose or gain electrons.

You should be able to use your skills, knowledge and understanding to:

Evaluate Newlands's and Mendeleev's work in terms of their contributions to the development of the modern design of the Periodic Table

Explain why scientists' viewpoints on the Periodic Table have changed, starting out first as a curiosity and developing into what most people regard as a useful tool and finally an important summary of the structure of atoms.

Practical work to develop your skills and understanding:

Demonstrating the combustion in reactions of sodium and potassium

Demonstrating the reactions of sodium and potassium with chlorine

Demonstrating the reactions of lithium, sodium and potassium with water

Demonstrating the reactions of the halogens with iron wool

Demonstrating the reactions of iron wool with steam

Investigating the displacement of halogens from solutions of their salts by more reactive halogens

Heating transition metals in air to compare reactivity and melting points with Group 1

Observing as many salts of transition metals as possible

Demonstrating transition metals and their salts as catalysts

Investigating the catalysts of hydrogen peroxide decomposition by different transition metals and their compounds.

#Chemistry #C3 #C3.1 #The Periodic Table

Project week

In de week voor de kerstvakantie was er de projectweek; een week waarin leerlingen een spel moesten ontwikkelen voor het vak ANW. Verschillende bordspellen tot een heus computerspel werden gemaakt. De sfeer was geweldig, met een open haard en een radiozender vol kerstklassiekers aan in het klaslokaal.

#projectweek #klaslokaal #c3.1