Solve the following equations and check your answers.
2a+8=3a+7​

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17