Whats the number of moles in 3.4 x 10^24 molecules of O2

It’s c it stays the same. and the atomic number goes up by 1. a neutron has changed into a proton plus an electron. the electron is emitted as a beta particle.

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.

Hello.the answer is  hydrosphere, geosphere, and biosphere  have a nice day