Which incorrect aspect of Rutherford's model was fixed by Bohr's model? (1 point)
O Electrons move freely in curved paths around the nucleus.
O The nucleus contains most of the mass of an atom.
O Atoms have small, dense, positively charged nuclei.
Positively charged nuclei repel positively charged alpha
particles

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

What happens to the average kinetic energy of a gas when the particles of the gas collide against each other at a constant temperature and volume? explain your answer.

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?