An atom of tin has an atomic number of 50 and a mass number of 119 how many protons neutrons and electrons does this atom have

Shane, who lives in Perth, Australia, has never seen a white Christmas. In fact, December is one of the hottest months in Australia. Why is it that Australia has such warm weather at this time of year?

Which one of the following is a weak acid? (a) H2SO4 (b) HF (c) HCl (d) HBr (e) HI

How does the motion of the particles change when thermal energy is added?

There are positive metal ions in a metal crystal, but a metal is not an ionic compound. Explain?

If oxygen is magnetic, why isnt it attracted to magnets?

Give one part of daltons atomic theory that is no longer excepted and explain why

Which factors would negatively impact the bodies digestive system

What's a predator? Are predators animals?

Do you think your model accurately represents an alcohol thermometer? How is it like a manufactured thermometer? How is it different?

Democritus contributed to our understanding of the atom in which of the following ways? 1. He determined the mass of the electron. 2. He determined the charge-to-mass ratio for the electron. 3.