Consider the two electron arrangements for neutral atoms A and B. What is the atomic number of B? A - 1s2, 2s2, 2p6, 3s1 B - 1s2, 2s2, 2p6, 5s1

What happens to isotopes that are unstable?

Describe what happens to the molecules as water goes from ice to liquid to vapor. be sure to explain what happens to the temperature during the phase changes.

Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)