1.Grassland are where most of our comes from?

A. domestic animals
B. crops used as food
C. house plants
D. Oxygen and carbon dioxide

Identify one disadvantage to each of the following models of electron configuration: dot structures arrow and line diagrams written electron configurations type in your answer below.

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

Asolid that forms and separates from a liquid mixture is called