Rodrigo wanted a way to cool a bottled drink without ice or refrigeration. He decided to use a chemical that cools as it dissolves in water. The chemical is poisonous, so he can't dissolve it directly in the drink. Instead, he designed the device shown below. Label the types of materials used in the design.

it may be made up of glass or porecelein ...material or material that should note react with the chemical

Explanation:

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year