Answer:
1. 16 protons, 18 electrons, 16 neutrons
2. Ba (2+) + 2 NO3 (-) + 2 Na (+) + SO4 (-) = 2 Na (+) + 2 NO3 (-) + BASO4
Explanation:
1. By looking at the number in the top left corner, we know the mass is 32. And by looking at the number in the bottom left, we know that we have 16 protons. Now the way to find neutrons is to subtract the number of protons from the mass (32-16) which will give us 16 neutrons. Now the electrons are a bit tricky. Usually, atoms have the same number of protons and electrons, hence why atoms don't usually have a charge. However, in this case we have a charge of 2- (as seen in the top right corner) so we need to add two to the number of protons to find our number of electrons (electrons are negatively charged, so if there are more of them the atom will have an overall negative charge) and when we do that we get 18. So the final answer is 16 protons, 18 electrons, and 16 neutrons.
2. This one I'm not 100% sure on since the pictures are kinda wonky but essentially the way net ionic equations are written is that whatever is aqueous/soluble (aq) will be written separate from whatever it was bonded to with the charge shown, but solids (s), liquids (l), and gases (g) are written still bonded without the charge being shown. So in this case, everything in the reaction is aqueous except for the BaSO4 product. The parentheses are used to show charges, but won't be written in an actual equation, and the equal sign is the same as the arrow. So you're equation is written as Ba (+) + 2 NO3 (-) + 2 Na (+) + So4 (2-) = 2 Na (+) + NO3 (-) + BaSO4.
Hope this helps! :)
Hydrophobic in simple terms is the "fear" of water.
In chemistry, Ionic salts are technically hydrophilic as they will dissolve in water.
most fats and oils or triesters won't why?
salts are made from ions and their structure contain polar bonds Na+ and Cl-
Fats and oils tend to not have these.
Fats and oils contain many carbon covalent bonds which are non-polar which tend to make the molecule non-polar as a whole, therefore, it can't dissolve in water and is said to be hydrophobic.
Hope that heps :)
NB included a diagram to help.
Barium, it's an earthy alkaline metal it's atomic number is 56
They have a full valence shell (8 electrons in the outer shell) so they are the most stable elements on the periodic table. Therefore, they do not need to react to other elements to gain or lose elections to become stable.
