Chalk is an ionic compound. Which is a property of all ionic compounds that makes chalk particularly useful for writing on a chalkboard? a high melting point hardness and brittleness inability to dissolve in water a multicolored appearance

the answer is B hardness and brittleness

Explanation:

I did edgenuity test ;)

B). hardness and brittleness

Explanation:

i took the test a few days ago and it was correct.

hope this helps. :)

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

answer; /// the above statement is (true);