The position of elements A, B, and C in the Periodic Table are shown below. Group 16 Group 17 - - - - - A B C State whether A is a metal or non-metal.

The element A is non-metal. This is because it belongs to group 17 , and has seven electrons in its outermost shell. So, it has a tendency to gain electrons to attain a stable noble gas configuration. Generally, non-metals are electron acceptors.

The position of elements A, B, and C in the Periodic Table are shown below. Group 16 Group 17 - - - - - A B C State whether C is more reactive or less reactive than A.

C is less reactive than A. This is due to the fact that atomic radius increases in size with an increase of electronic energy levels. This lessens the attraction for valence electrons of other atoms, decreasing reactivity. This decrease also occurs because electronegativity decreases down a group; therefore, there is less electron "pulling."

The position of elements A, B, and C in the Periodic Table are shown below. Group 16 Group 17 - - - - - A B C Will C be larger or smaller in size than B.

C will be smaller in size than B as moving across a period, the nuclear charge increases, and therefore electrons come closer to the nucleus. Atomic size gradually decreases from left to right across a period of elements.

What is Newlands’ Law of Octaves? What were the limitations of Newlands’ Law of Octaves?

British scientist John Alexander Newlands gave the law of octaves according to which when elements are arranged in increasing order of their atomic weights, then the properties of every eighth element will be similar to those of the first. There were many limitations with Newlands' Law of Octaves. These are as follows: It could accommodate only 56 elements and did not have any place for new elements. It was found that the Law of Octaves was applicable only up to calcium, as after calcium the eighth element did not possess properties similar to that of the first. Newlands put some unlike elements in the same group. Iron was placed with oxygen and sulphur, although its properties were very different from them.

The position of elements A, B, and C in the Periodic Table are shown below. Group 16 Group 17 - - - - - A B C Will C be larger or smaller in size than B.

C will be smaller in size than B as moving across a period, the nuclear charge increases, and therefore electrons come closer to the nucleus. Atomic size gradually decreases from left to right across a period of elements.

The position of elements A, B, and C in the Periodic Table are shown below. Group 16 Group 17 - - - - - A B C State whether C is more reactive or less reactive than A.

C is less reactive than A. This is due to the fact that atomic radius increases in size with an increase of electronic energy levels. This lessens the attraction for valence electrons of other atoms, decreasing reactivity. This decrease also occurs because electronegativity decreases down a group; therefore, there is less electron "pulling."

The position of elements A, B, and C in the Periodic Table are shown below. Group 16 Group 17 - - - - - A B C State whether A is a metal or non-metal.

The element A is non-metal. This is because it belongs to group 17 , and has seven electrons in its outermost shell. So, it has a tendency to gain electrons to attain a stable noble gas configuration. Generally, non-metals are electron acceptors.