Write down any two test for the CH2=CH2[ethene]​

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

Which of the following is a conclusion that resulted from ernest rutherford’s scattering experiment? (will mark brainliest) a. the nucleus is negatively charged b. the atom is a dense solid and is indivisible c. the mass is conserved when atoms react chemically d. the nucleus is very small and the atom is mostly empty space