The molar mass of K is 39, Cr is 52, and O is 16. The rough calculation of these numbers are 294.
Answer:
D. All of the above are true
The number of protons define the element. Since this element has 13 protons, the element is aluminum. This certain atom is also an isotope of aluminum since the atom can have different numbers of neutrons
Answer:
890 has 2 significant figures
