Use the periodic table to predict which element has the LEAST metallic character--- silicon sodium krypton or potassium ??????

Chemistry

2 answers:

stepan [7]3 years ago

5 0

Answer: Option (c) is the correct answer.

Explanation:

Metallic character means the level of reactivity of metals. It is known that metals have excess of electrons, therefore, in order to follow octet rule they readily lose electrons to attain stability.

Sodium and potassium are metals and therefore, they have high metallic character.

Whereas silicon is a non-metal and readily reacts with a metal to completely fill its valence shell.

On the other hand, krypton is a noble gas and has completely filled shell. Therefore, it's reactivity will be the least.

Thus, we can conclude that krypton has the least metallic character.

Andru [333]3 years ago

4 0

krypton is the answer blah blah blah is this enough letters

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The ph scale for acidity is defined by ph=−log10[h+] where [h+]is the concentration of hydrogen ions measured in moles per liter

Leokris [45]

The question is incomplete.

The complete question probably is

The pH scale for acidity is defined by pH = − log₁₀[H⁺] where [H⁺] is the concentration of hydrogen ions measured in moles per liter (M). A solution has a pH of 2.55. Find the hydrogen ion concentration.

Answer: -

0.003 M

Explanation: -

pH = − log₁₀[H⁺]

Thus the hydrogen ion concentration [H⁺] = $10^{-pH}$