I check all of them. most of them correct but one
in question 6, the answer is the third choice. remember to find the neutrons, you take the atomic mass minus the atomic number. 38 - 18= 20
Answer:
im not sure
Explanation:
i went on here looking nobody answered yet
The answer is d noble gas because the very last column on the periodic table is all the noble gases
Chemical,when you light a match stick, you are starting a chain reaction of the substance chemical formula, making it a chemical change
