Question

25. The size of an atom depends on the number of compound electrons.
26. Silicon is a metallic element.
27. The properties of the metal increase as it goes down in the calculation
28. Electrical negativity is the metallic property of an element.
29. If edible oil is kept well for a long time, it will get sour.
30. The alternating current is a vibrating current
31. Electrical wires and neutral wires have a 220 V potential difference.​

Answer 1

Answer:

behaviour. This family of elements is also known as the lithium family after its leading element.

Alkali metals

Answer 2

Explanation:

25. wrong ,

the size of an atoms depend upon its atomic radius

26. wrong,

silicon is metalloid.

27. wrong ,

Both physical and chemical properties of elements remains same in group.

28.wrong,

electrical negativity is non metallic character

29. wrong

it will become rancid.

30. right.

31. wrong ,

live wires and neutral wires have PD of 220 V