Question

Consider the following statements and arrange in the order of true/ false as given in the codes.
$S_1$: Metals comprises less than 78% of all known elements and appear on the left side of the periodic table.
$S_2$: Silicon, germanium, arsenic, antimony, selenium and tellurium all are semi-metals.
$S_3$: The following order represents the correct increasing order of metallic character; $P<Si<Be<Mg<Na$

• A. FFT
• B. TTF
• C. FTF
• D. TTT

Answer 1

Answer: (A)

FFT

About $80$ percent of the elements are metals (shiny elements that conduct heat and electricity well), and $15$ percent of the elements are non-metals (poor conductors of heat and electricity).

Selenium is a chemical element with symbol Se and atomic number $34$. It is a non-metal Metallic character refers to the level of reactivity of a metal. Metals tend to lose electrons in chemical reactions, as indicated by their low ionization energies. Within a compound, metal atoms have relatively low attraction for electrons, as indicated by their low electronegativities.