14. a neutron has a charge of
(1) +1
(2) +2
(3) o
(4) -1

Is laundry detergent an acid or a base?

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Can someone me with 3 and 4 plz. this is for masteries test.