An electrically neutral atom of oxygen has eight electrons. what other facts do you know for sure about this atom? there are eight neutrons in the nucleus. there are eight protons. there is a charge of +8 on an atom of beryllium. there is a charge of 8 on an atom of beryllium.

There are eight protons.

Explanation:

Mass number is the sum of total number of protons and neutrons present in the nucleus of an atom.

On the other hand, atomic number is only the total number of protons present in an atom.

Also, when an atom is electrically neutral in nature then its number of protons equal to the number of electrons present in it.

An electrically neutral atom of oxygen has 8 electrons and 8 protons. It can have any number of neutrons depending on the isotope of oxygen.

Thus, we can conclude that an electrically neutral atom of oxygen that has eight electrons will also have 8 protons.

state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.