Answer:
Roman numeral notation indicates charge of ion when element commonly forms more than one ion. For example, iron(II) has a 2+ charge; iron(III) a 3+ charge.
Explanation:
Mass number = protons + neutrons
mass number = 5 + 7
mass number = 12
The temperature of a substance is related to the speed of the substance's particles. So, when the temperature of a substance changes,the speed of the particles also changes. So B.
Answer:
C
Explanation:
It afffects changes in pressure and temperature not melting and boiling points
