Which is most likely to be reduced?
A. Fe^2+
B. Zn^2+
C. Ni^2+
D. Cu^2+

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.

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.

c, liquids evaporate, creating a gas

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.