Answer:
Yeah chemical change occurs when you fry an egg since the whites harden and change shape in a way. Mass is conserved since it doesn't change.
8 because atomic number is the same as number of protons, protons and electrons have the same amount so that the element is neither positive nor negative.
Answer:
yes
Explanation:
Two covalent bonds form between the two oxygen atoms because oxygen requires two shared electrons to fill its outermost shell.
Tree rings tell us how old the tree is.