photo.jpg

# Element * Substance composed of only one kind of atom * Can't be broken down into simpler substances * Chemical reactions ## Essential Elements * Carbon, C * Hydrogen, H * Oxygen, O * Nitrogen, N * Calcium, Ca * Potassium, K * Phosphorus, P * Sulphur, S * Sodium, Na * Chlorine, Cl * Magnesium,...

# Element * Substance composed of only one kind of atom * Can't be broken down into simpler substances * Chemical reactions ## Essential Elements * Carbon, C * Hydrogen, H * Oxygen, O * Nitrogen, N * Calcium, Ca * Potassium, K * Phosphorus, P * Sulphur, S * Sodium, Na * Chlorine, Cl * Magnesium, Mg > Need in large amounts ## Traces Elements * Copper, Cu * Iodine, I * Ferum, Fe > Need in small amounts