5. which of the following statements is not true?
the nucleus of an atom has a positive charge.
atoms of the same element can have different masses.
atoms of isotopes of an element have different numbers of protons.
atoms are mostly empty space.

Note the ph and poh values labeled with letters on the ph scale below. based on log rules and the way ph is calculated, what is the difference in [oh– ] concentration between point a and point b. a) 10^1 b) 10^5 c) 10^6 d) 10^7

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

Miner's coal distributors does not mine coal itself, nor does it even store or handle the coal. instead, miner's solicits orders for low sulfur coal from other firms, then purchases the required amount from suppliers and directs them to ship the coal to its customers. what is miner's