Prepare 200 ml of 50 ppm of Mg 2 from the white crystalline solid Mg(NO3)2? +2
At wt: (N=14, 0=16, Mg=24.3) g/mole

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.

it's filtration, but this is an assumption so my apologies if i got this

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i