Answer:
Which one? 1, 2, 3, 4 ,5, 6, or 7?
Explanation:
No. Radiation is not in the magnetic “criteria” so it would not be correct.
Answer:
The concentration of hydroxide ions in a 3.5 is
C. 10.5
Answer: electron donor.
Explanation:
According to Arrhenius concept, a base is defined as a substance which donates hydroxide ions
when dissolved in water and an acid is defined as a substance which donates hydronium ions
in water.
According to the Bronsted Lowry conjugate acid-base theory, an acid is defined as a substance which donates protons and a base is defined as a substance which accepts protons.
According to the Lewis concept, an acid is defined as a substance that accepts electron pairs and base is defined as a substance which donates electron pairs.

Here
acts as lewis base and
act as lewis acid.
Thus lewis base is defined as an electron pair donor.
Answer:
XCl2(aq) + 2 AgNO3(aq) = 2 AgCl(s) + X(NO3)2(aq)