Answer:
Density depends on the amount of the substance you have, as the mass will increase, but also what the volume is because if you have a high mass object with an extremely high volume, it won't be very dense. But if you have a high mass object with a low volume, it will be very dense.
Answer:
Bari oxit được tạo nên từ các nguyên tố Bari (Ba) và Oxi (O)
Explanation:
It's the rows. They are periods. (1,2,3,4,5,6,7 - the ones without the letters).
Answer:
Fe is just the shortened version of Iron whereas Fe2+ is a positive ion,cation to be more specific
