The tendency of an element to react is closely related to?
a. its atomic mass
b. attractions between its atoms
c. the number of valences electrons in atoms of the element
d. the ratio of protons to neutrons in atoms of the element

How are elements arranged in a periodic table

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)