Find an element that has the same number of valence electrons as
Thallium (T1).
i need the answer nowww

A+b→2c when the reaction begins, the researcher records that the rate of reaction is such that 1 mole of a is consumed per minute. after making changes to the reaction, the researcher notes that 2 moles of a are consumed per minute. what change could the researcher have made to effect this change?

At stp, what is the volume of 1 mole of co2?

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?