Question

question 11
an element in the upper right corner of the periodic table
is either a metal or metalloid
is definitely a nonmetal
is either a metalloid or a nonmetal
is definitely a metalloid
is definitely a metal
question 12
which species has 54 electrons?
₅₂¹²⁸te²⁻
₅₄¹³¹xe⁺
₅₄¹³²xe²⁺
₅₀¹¹⁸sn²⁺
₄₈¹¹²cd

Explanation:

For Question 11: Elements in the upper - right corner of the periodic table are non - metals. This is because of their high electronegativities and electron - gaining tendencies. For Question 12: The atomic number of an element gives the number of protons and in a neutral atom, the number of electrons. For ions, we adjust the number of electrons based on the charge. Xenon (Xe) has an atomic number of 54. In $^{131}_{54}Xe^+$, the number of electrons is 53. In $^{132}_{54}Xe^{2 + }$, the number of electrons is 52. Tin (Sn) has an atomic number of 50, so $^{118}_{50}Sn^{2+}$ has 48 electrons. Cadmium (Cd) has an atomic number of 48. Tellurium (Te) has an atomic number of 52, and $^{128}_{52}Te^{2 - }$ has 54 electrons.

Answer:

Question 11: is definitely a nonmetal
Question 12: $^{128}_{52}Te^{2 - }$