Why does the effective nuclear charge increase across a row of the periodic table?

How can you determine the number of valence electrons an atom has

Unlike food webs, food chains

why does mars take 462.3 earth days more than venus to revolve around the sun A. mars is cooler then Venus B. Mars is lighter then Venus C. the sun is closer to Venus then it is to mars D. the diameter of mars is less then that of Venus

How many moles of LiOH are required to prepare 1.50L of 5.4 M LiOH?

What does the number next to the ions signify?

Which is the MOST accurate description about how the different types of feedback mechanisms work

What was one of the main benefits to the use of the icebox for cooling food?

How many moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 0.98 atm and a temperature of 373 K?

What are the building blocks

If the specific heat of copper is 0.711 J/g•°C, how much copper would it take if the heat given off is 54.85 calories and the temperature change is 205°C.