Which of the following elements have a mass of 9.012 and 4 electrons?

How many valence electrons does elements in group 13 have?

Elements found to the right of the metalloids on the periodic table?

Silver has how many protons?

A mirror is made to reflect light into a sensor. What should the mirror be made of?

A mirror is made to reflect light into a sensor. What should the mirror be made of?

A wire needs to conduct electricity, what is a wire made of?

A wire needs to conduct electricity, what is a wire made of?

Why is Carbon not used in a metal knee replacement?

What material is silicon?

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