Periodicity MYP5

Periodicity is

• the recurring nature of the properties of some of the elements in the periodic table

• the recurring nature of the properties of elements in the periodic table with increasing mass

• the recurring nature of the properties of elements in the periodic table with increasing atomic number

• the recurring properties of isotopes in elements

What trend is shown here

• atomic radius increasing down group 7

• atomic radius decreasing across a period

• atomic radius increasing across a period

• atomic radius decreasing down group 7

Ionic radius is a radius of an ion. It has the same trend in metals. Considering that, ionic radius in group 1 will ................ down the group.

Radius of a Selenium (Se) atom is ........ than that of an Arsenic (As) atom.

Bromine (Br) is bigger than Chlorine (Cl). Iodine (I) is ............ than Chlorine (Cl).

Electronegativity is the power of an atom to attract ................ to itself

Electronegativity ............. from left to right in a period

Electronegativity ................. in groups from top to bottom (down the group)

Choose correct keywords to the gaps. Ionisation energy is the energy required to ................ an electron from an atom to form a +1 .............

• add, atom

• add, ion

• remove, ion

• remove, atom

Which diagram shows ionisation energy across a period (left to right)?

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