Consider the reaction below. c2h4(g) + h2(g) mc030-1.jpg c2h6(g) which change would likely cause the greatest increase in the rate of the reaction?

it's (d) increase temperature and increase pressure

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.