17 p

18 n

What is the atomic number of this element?

The frequency, wavelength, and amplitude of a simple wave can best be described as what? A) random B) a force C) a pattern D) unpredictable

Convert 32 mg/ml to g/L

Why do you think knowing enthalpy of reaction might be useful?

Would Sodium (Na) and Magnesium (Mg) bond to make a compound? Why or why not?

All plants need water to survive. How does water enter the plant?

An atom of oxygen (atomic number 8) with an atomic mass of 16 would have how many neutrons?

Chlorophyll reflects which of these colors? a. red b. blue c. green d. yellow

Extracting oil from shale deposits a has been initiated on a large scale in the United States and will soon surpass Canada's production. b involves removing and refining waxy hydrocarbons called kerogen.

Which shows the levels of organization within an ecosystem from largest to smallest?

the physical properties of 10 grams of iron are the same as the ___ properties of 20 grams of iron a) reactive b) physical c) chemical