All of the following show a periodic pattern except

A. the dog ate everyone of his play toys

B. The lawn is mowed every thursday

C. Their are 12 months in ayear

D. Their are 60 seconds in a minuite

Contains 63.65% nitrogen and 36.35% oxygen by mass what is the empirical formula for this compound

Which is the correct symbol for the atom with 42 protons and 49 neutrons?

A hydrocarbon sample with a mass of 6 grams underwent combustion, producing 11 grams of carbon dioxide.

What is a functional group? A-a group of organs in the body that work together to perform a certain function B-a group of living things that are made up of organic compounds C-a group of atoms bonded to carbon that determines how the molecule will

Describe how the surface area affect the rate of a reaction

1. Ionic compounds generally form solids because:

A friend says that temperature increases altitude increases becauses you're moving towards the sun. Is this true? Explain.

Zinc put in concertrated sodium hydroxide

how do geologists use seismic waves to locate an earthquakes epicenter

Which formula id correctly paired with its name? A. MgSO↓ = magnesium chlorine B. FeO = iron (|||) oxide C. K↓2O = Phosphorus dioxide D. CuCI↓2 = copper (||) chloride