All the isotopes of a given atom have(1) the same mass number and the same atomic number(2) the same mass number but different atomic numbers(3) different mass numbers but the same atomic number(4) different mass numbers and different atomic numbers

Y=‐1x + 7 if y has a value of ‐24 what is the value of x?

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.

Complete each row of the table below by filling in the missing prefix or missing exponent.