How did moseley establish a more accurate periodic table?

a. by arranging the elements according to atomic mass instead of atomic number
b. by arranging the elements according to atomic number instead of atomic mass
c. by arranging the elements into horizontal periods
d. by arranging the elements into vertical groups

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

Which statement would indicate the presence of an acid