Directions: On the line before each question or statement, write the letter of the correct answer. 1. Some substances are chemically combined in specific combinations. These are
A. compounds.
B. homogeneous mixtures.
C. heterogeneous mixtures.
2. Which item is a form of matter?
A. air
B. sound
C. gravity
3. Which item is a substance?
A. trail mix
B. table salt
C. breakfast cereal

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

idk what is it? is this a question that you know the answer or u dont

the objects have the same charge is correct.

nathan lee