House hold paint is a pure substance hope this helps :)
Physical properties are the characteristics of matter that can be seen or measured through direct observation.
It is true
Answer:
197.5pm
Explanation:
Given parameters:
Diameter of the atom = 395pm
Unknown:
Radius of the atom =?
Solution:
Radius is the half of diameter;
Radius =
Radius =
= 197.5pm
They have the same number of "protons" but a different number of "neutrons" therefore their "atomic number" weight(or mass) is different