As we move away from nucleus potential energy of electron increases while kinetic energy of electron decreases. So why total energy of electron away from nucleus increiases?

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?

Which statement about the stamps is correct?

Which element is the least metallic between cadmium, silver, zinc, or iron?