I will pick the brainiest answer! Thanks! :) 1. What is the difference between a chemical and physical change?

2. What is the difference between a property and change?

1. What is the difference between a chemical and physical change?

physical change :-

chemical change :-

2. What is the difference between a property and change

change:-

A physical change in a substance doesn't actually change what the substance is. It remains the same. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.

property:-

A physical property is an aspect that can be observed or measured without being changed. A chemical property may only be observed by changing the chemical identity or substance.

HOPE THIS HELPS

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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