Describe how you would test your indicator to check that it works​

If the colour of the indicator changes blue when a base is there and when it changes to red or pink or scarlet when it is acid. Then we can say that the indicator is working

d: the voltage of the secondary coil is less than that of the primary coil.

im not suree sorry if wrong

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.