A portion of the periodic table of elements is reproduced here. Based on their relative positions, what conclusion can be drawn about these metallic elements?
20
25
K
Ca
Sc
Ti
V
Cr
Mn
Fe
anganese
Iron
Potassium
39.09
Calcium
40.00
Scandium
44.96
Titanium
47.87
Vanadium
50.94
Chromium
51.99
54.94
55.85
O Chromium is twice as reactive as vanadium.
O Potassium is much more reactive than iron.
O Calcium is much less reactive than scandium.
O All the elements have the same reactivity.

give me abc and i will get it for u.

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.