A researcher wants to experiment with an element that reacts like Nitrogen (N) but had a greater atomic mass. Which element should she select?

Question

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Na
S
As
Si
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Answer 1

The element that reacts like nitrogen (N) but has a greater atomic mass is Arsenic (As). Arsenic is located below nitrogen in the periodic table, within the same group (Group 15). It shares similar chemical properties due to its position in the periodic table and has a greater atomic mass than nitrogen.

The other options:

• Sodium (Na) is an alkali metal and does not have similar properties to nitrogen.
• Sulfur (S) is in a different group (Group 16) and does not resemble nitrogen's reactivity.
• Silicon (Si) is in Group 14 and also does not have similar chemical properties to nitrogen.

Thus, the correct choice is As (Arsenic).