1:18

1:18 understand how elements are arranged in the Periodic Table: in order of atomic number, in groups and periods

The elements in the Periodic Table are arranged in order of increasing atomic number.

Columns are called Groups. They indicate the number of electrons in the outer shell of an atom.

Rows are called Periods. They indicate the number of shells (energy levels) in an atom.

Spec	Q'stion	Ans	MS
1:18	Jan '12 (2), Q 2 a iii	Answer	MkS
1:18	Jan '12 (2), Q 2 a iv	Answer	MkS
1:18	Jan '12 (2), Q 2 b i	Answer	MkS
1:18	Jan '14 (1), Q 8 b	Answer	MkS
1:18	Jan '16 (1), Q 1 a i	Answer	MkS
1:18	Jan '16 (1), Q 1 a ii	Answer	MkS
1:18	Jan '17 (1), Q 5 a i	Answer	MkS
1:18	Jan '18 (1), Q 1 a	Answer	MkS
1:18	Jan '18 (1), Q 1 b	Answer	MkS
1:18	Jan '18 (1), Q 1 c	Answer	MkS
1:18	Jan '18 (1), Q 1 d	Answer	MkS
1:18	Jan '18 (1), Q 1 e	Answer	MkS
1:18	Jan '18 (2), Q 5 a	Answer	MkS
1:18	May '11 (1), Q 5 a ii	Answer	MkS
1:18	May '11 (1), Q 5 a iii	Answer	MkS
1:18	May '12 (1), Q 4 a	Answer	MkS
1:18	May '13 (2R), Q 1 a	Answer	MkS
1:18	May '13 (2R), Q 1 b	Answer	MkS
1:18	May '13 (2R), Q 1 d	Answer	MkS
1:18	May '14 (1), Q 3 a ii	Answer	MkS
1:18	May '14 (2), Q 3 a i	Answer	MkS
1:18	May '14 (2), Q 3 a ii	Answer	MkS
1:18	May '15 (2), Q 1 b	Answer	MkS
1:18	May '15 (2R), Q 1 b i	Answer	MkS
1:18	May '15 (2R), Q 1 b ii	Answer	MkS
1:18	May '16 (1), Q 4 a	Answer	MkS
1:18	May '16 (1R), Q 2 c	Answer	MkS
1:18	May '17 (2), Q 2 a	Answer	MkS
1:18	May '17 (2), Q 2 b	Answer	MkS
1:18	May '17 (2R), Q 1 a iii	Answer	MkS