EASY 30 POINTS! PLS HELP ME T-T 1. True or false? All atoms in an element contain an identical number of neutrons.

2. An atom with a charge has the same number of protons and electrons.

3. An atom that has a different number of electrons and protons is called a(n) .

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.

Lord kelvin described the concept of absolute zero temperature and the laws relating to the change of thermal energy during chemical reactions what type of chemist would he be considered today