8 The Periodic Table

Front

The Periodic Table is an arrangement of elements in periods and groups, in order of increasing .................... / ................... number

Back

the Periodic Table is an arrangement of elements in periods and groups and in order of increasing proton or atomic number

Front

Element property changes from .................... to .......................... character across a period, from left to right

Back

Element property changes from metallic to non-metallic character across a period, from left to right

Front

Describe the relationship between group number and the charge of the ions formed from elements in that group

Back

Elements in the same group tend to form ions with the same charge, which corresponds to their group number.

Front

Explain similarities in the chemical properties of elements in the same group of the Periodic Table in terms of their electronic configuration

Back

Elements in the same group have the same number of electrons in the outermost shell, leading to similar chemical properties.

Front

Describe the trend in melting point, density and reactivity of Group I alkali metals.

Back

Down the group:

Melting point decreases

Density increases (Potassium is an exception to this trend), Reactivity increases.

Front

Describe how Group I metals react with oxygen and water

Back

• They react readily with oxygen and water vapour in air so they are stored under oil to stop them from reacting.

• Group I alkali metals will react with water, reacting vigorously to produce an alkaline metal hydroxide solution and hydrogen gas.

Front

Describe the colour and state of Group VII halogens, chlorine, bromine and iodine at room temperature and pressure

Back

• Chlorine is a pale yellow-green gas, bromine is a red-brown liquid and iodine is a grey-black solid

Front

Going down Group VII halogens, from chlorine, bromine to iodine, their ................... increases down the group, and their ................. decreases down the group.

Back

Going down Group VII halogens, from chlorine, bromine to iodine, their density increases down the group, and their reactivity decreases down the group.

Front

Describe and explain the displacement reactions of halogens with other halide ions.

Back

Halogens can displace less reactive halides from their compounds in a reaction.

Front

Describe the physical properties of transition elements that are different from Group I alkali metals

Back

Transition metals have higher density, higher melting points and they are harder