carbohydrates lipids nucleic acids proteins
Well, No options were given in the question. But normally group 1 (alkali metals) and group 17 (halogens) are the most reactive groups.
Transition metals
The alkali metals and the halogens.
1 and 17
There are 18 groups and 7 periods in the modern periodic table.
Groups in the periodic table are the vertical columns in which the elements are arranged.
The elements with similar properties are placed in groups. Periodic table contain 18 groups.
There are 18 groups that make up The Periodic Table of Elements.
by groups and periods
There are 18 groups in the periodic table of elements.
There are 18 groups and 7 periods in the modern periodic table.
Groups in the periodic table are the vertical columns in which the elements are arranged.
There are 18 groups in the Periodic Table of elements.
On the periodic table the elements are called groups.
There are 18 main groups in the modern periodic table of elements.
There are a total of 18 groups on The Periodic Table of Elements.
In the periodic table chemical elements are orderd in periods and groups.
The elements with similar properties are placed in groups. Periodic table contain 18 groups.
For example the elements from the first two groups are easily combined with halogens; or noble gases are very unreactive, etc.
All groups in the periodic table contain chemical elements.
The periodic table of Mendeleev contain now 118 chemical elements arranged in groups and periods.