Um can someone just help me with the first question so I have an idea of what to do...please

Which of the following statements is true? question 4 options: nuclear decay rates vary with the conditions of the reaction, but chemical reaction rates do not. chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not. neither chemical reaction rates nor nuclear decay rates vary with the conditions of the reaction. both chemical reaction rates and nuclear decay rates vary with the conditions of the reaction.

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

Which statement is best described as a atom