How many electrons does the isotope oxygen-18 have?

6

8

10

18

Which characteristic of atoms is the basis for the order on the Periodic Table? A. reactivity B. atomic size C. atomic number D. mass number

Which proportionality shows the result of combining Avogadro's law with Boyle's law?

A scientist involved in cloning would need to have a good understanding of genetic engineering. t or f

A sample of gas occupying 350 mL at 25 C is cooled to - 25 C. What volume will it occupy if the pressure is held constant?

Which has more energy: yellow or violet light? And why?

NaCl + H2O → NaOH + Cl2 + H2 How many grams of chlorine gas, Cl2 are given off if 7.5 grams of sodium chloride, NaCl, are decomposed? Is this equation balanced?

What is the net ionic equation for the precipitation reaction between bacl2 and na2so4? a bacl2 (aq + na2so4 (aq? baso4 (s + 2nacl (aq b ba2 + (aq + so42 - (aq? baso4 (s c na + (aq + cl - (aq?

2. A compound with the following composition by mass: 24.0% C, 7.0% H, 38.0% F, and 31.0% P. what is the empirical formula

Why does the burning of magnesium ribbon start the reaction between iron oxide and aluminium when making iron?

Select all the elements that are in the same period as calcium potassium magnesium bromine scandium