Which of these periods contain elements with electrons s, p,d and f orbitals? periods 1-3 periods 1-4
periods 3-5
periods 6-7

What type of reaction is shown below? check all that apply. 2h2o2 → 2h2o + o2 synthesis decomposition combustion

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?