Answer:
Dalton's says atoms of different elements differ in size and mass, whereas the modern theory says they differ in average mass. Dalton's says atoms are individual particles, whereas the modern theory says atoms are divisible into subatomic particles like protons, neutrons, and electrons..
Explanation:
HOPES ITS HELPFUL FOR U IF YES PLZ MARK ME AS BRILLIANT PLZ DUDE PLZ I NEED IT
6787.67458865446899675566
Answer: metallic solid
Explanation:
Copper is a metallic crystalline solid. A metallic solid is an element that can withstand high temperatures and conduct electricity.
25. Electrons are so small that they don't add, much if any, to the mass number. So you just add the protons and neutrons to get the rough estimate of the mass number.