D. 18 x 10^23 is the total number of atoms in 1.0 mole of CO2
Answer:
Stronium
Explanation:
It is a metal (and shows classic physical proerties). It also belongs to the second family, meaning it has two valence electrons.
Answer:
At the melting point, some molecules overcome the forces of attraction. Energy gained after the the solid melts increases the average kinetic energy or the temperature. When liquid is freezing the energy flows out the the liquid. As the kinetic energy decreases, they move more slowly.
Explanation:
Answer:
23
Explanation:
we do not care about electrons, so 11 + 12 = 23
