Answer:
F, S, Mg, Ba
Explanation:
Fluorine has a small atomic radius. These go up until Ba, which has a larger radius
Magnesium dichloride or Magnesium chloride
Answer:

Explanation:
By the First Law of Thermodynamics, the piece of metal and water reaches thermal equilibrium when water receives heat from the piece of metal. Then:




Frequency is represented by f in the formula v=fπ. Where π is wavelength , f is frequency and v is velocity. Frequency is the number of waves passing per unit time.
Answer: 0.002 M
Explanation:
The balanced chemical equation for ionization of
in water is:

According to stoichiometry :
1 mole of
ionizes to give =2 mole of
ions
0.001 mole of
ionizes to give =
mole of
ions
Thus
of a solution of 0.001 M aqueous sulfuric acid is 0.002 M